Redis 作为内存数据结构存储快速入门指南
了解如何使用基本 Redis 数据类型
本快速入门指南向您展示如何：
- 开始使用 Redis
- 在 Redis 中根据键存储数据
- 使用 Redis 中的密钥检索数据
- 扫描键空间以查找与特定模式匹配的键
本文中的示例指的是简单的自行车清单。
设置
开始使用 Redis 最简单的方法是使用 Redis Cloud：
-
创建一个免费帐户。
-
按照说明创建一个免费数据库。
您也可以按照安装指南在本地机器上安装 Redis。
连接
第一步是连接到 Redis。您可以在本文档站点的连接部分中找到有关连接选项的更多详细信息。以下示例显示如何连接到在 localhost ( -h 127.0.0.1) 上运行并侦听默认端口 ( -p 6379) 的 Redis 服务器：
> redis-cli -h 127.0.0.1 -p 6379您是否厌倦了使用 redis-cli？尝试 Redis Insight - Redis 的开发人员 GUI。
"""
Code samples for document database quickstart pages:
https://redis.github.net.cn/docs/latest/develop/get-started/document-database/
"""
import redis
import redis.commands.search.aggregation as aggregations
import redis.commands.search.reducers as reducers
from redis.commands.json.path import Path
from redis.commands.search.field import NumericField, TagField, TextField
from redis.commands.search.indexDefinition import IndexDefinition, IndexType
from redis.commands.search.query import Query
r = redis.Redis(host="localhost", port=6379, db=0, decode_responses=True)
bicycle = {
"brand": "Velorim",
"model": "Jigger",
"price": 270,
"description": (
"Small and powerful, the Jigger is the best ride "
"for the smallest of tikes! This is the tiniest "
"kids’ pedal bike on the market available without"
" a coaster brake, the Jigger is the vehicle of "
"choice for the rare tenacious little rider "
"raring to go."
),
"condition": "new",
}
bicycles = [
bicycle,
{
"brand": "Bicyk",
"model": "Hillcraft",
"price": 1200,
"description": (
"Kids want to ride with as little weight as possible."
" Especially on an incline! They may be at the age "
'when a 27.5" wheel bike is just too clumsy coming '
'off a 24" bike. The Hillcraft 26 is just the solution'
" they need!"
),
"condition": "used",
},
{
"brand": "Nord",
"model": "Chook air 5",
"price": 815,
"description": (
"The Chook Air 5 gives kids aged six years and older "
"a durable and uberlight mountain bike for their first"
" experience on tracks and easy cruising through forests"
" and fields. The lower top tube makes it easy to mount"
" and dismount in any situation, giving your kids greater"
" safety on the trails."
),
"condition": "used",
},
{
"brand": "Eva",
"model": "Eva 291",
"price": 3400,
"description": (
"The sister company to Nord, Eva launched in 2005 as the"
" first and only women-dedicated bicycle brand. Designed"
" by women for women, allEva bikes are optimized for the"
" feminine physique using analytics from a body metrics"
" database. If you like 29ers, try the Eva 291. It’s a "
"brand new bike for 2022.. This full-suspension, "
"cross-country ride has been designed for velocity. The"
" 291 has 100mm of front and rear travel, a superlight "
"aluminum frame and fast-rolling 29-inch wheels. Yippee!"
),
"condition": "used",
},
{
"brand": "Noka Bikes",
"model": "Kahuna",
"price": 3200,
"description": (
"Whether you want to try your hand at XC racing or are "
"looking for a lively trail bike that's just as inspiring"
" on the climbs as it is over rougher ground, the Wilder"
" is one heck of a bike built specifically for short women."
" Both the frames and components have been tweaked to "
"include a women’s saddle, different bars and unique "
"colourway."
),
"condition": "used",
},
{
"brand": "Breakout",
"model": "XBN 2.1 Alloy",
"price": 810,
"description": (
"The XBN 2.1 Alloy is our entry-level road bike – but that’s"
" not to say that it’s a basic machine. With an internal "
"weld aluminium frame, a full carbon fork, and the slick-shifting"
" Claris gears from Shimano’s, this is a bike which doesn’t"
" break the bank and delivers craved performance."
),
"condition": "new",
},
{
"brand": "ScramBikes",
"model": "WattBike",
"price": 2300,
"description": (
"The WattBike is the best e-bike for people who still feel young"
" at heart. It has a Bafang 1000W mid-drive system and a 48V"
" 17.5AH Samsung Lithium-Ion battery, allowing you to ride for"
" more than 60 miles on one charge. It’s great for tackling hilly"
" terrain or if you just fancy a more leisurely ride. With three"
" working modes, you can choose between E-bike, assisted bicycle,"
" and normal bike modes."
),
"condition": "new",
},
{
"brand": "Peaknetic",
"model": "Secto",
"price": 430,
"description": (
"If you struggle with stiff fingers or a kinked neck or back after"
" a few minutes on the road, this lightweight, aluminum bike"
" alleviates those issues and allows you to enjoy the ride. From"
" the ergonomic grips to the lumbar-supporting seat position, the"
" Roll Low-Entry offers incredible comfort. The rear-inclined seat"
" tube facilitates stability by allowing you to put a foot on the"
" ground to balance at a stop, and the low step-over frame makes it"
" accessible for all ability and mobility levels. The saddle is"
" very soft, with a wide back to support your hip joints and a"
" cutout in the center to redistribute that pressure. Rim brakes"
" deliver satisfactory braking control, and the wide tires provide"
" a smooth, stable ride on paved roads and gravel. Rack and fender"
" mounts facilitate setting up the Roll Low-Entry as your preferred"
" commuter, and the BMX-like handlebar offers space for mounting a"
" flashlight, bell, or phone holder."
),
"condition": "new",
},
{
"brand": "nHill",
"model": "Summit",
"price": 1200,
"description": (
"This budget mountain bike from nHill performs well both on bike"
" paths and on the trail. The fork with 100mm of travel absorbs"
" rough terrain. Fat Kenda Booster tires give you grip in corners"
" and on wet trails. The Shimano Tourney drivetrain offered enough"
" gears for finding a comfortable pace to ride uphill, and the"
" Tektro hydraulic disc brakes break smoothly. Whether you want an"
" affordable bike that you can take to work, but also take trail in"
" mountains on the weekends or you’re just after a stable,"
" comfortable ride for the bike path, the Summit gives a good value"
" for money."
),
"condition": "new",
},
{
"model": "ThrillCycle",
"brand": "BikeShind",
"price": 815,
"description": (
"An artsy, retro-inspired bicycle that’s as functional as it is"
" pretty: The ThrillCycle steel frame offers a smooth ride. A"
" 9-speed drivetrain has enough gears for coasting in the city, but"
" we wouldn’t suggest taking it to the mountains. Fenders protect"
" you from mud, and a rear basket lets you transport groceries,"
" flowers and books. The ThrillCycle comes with a limited lifetime"
" warranty, so this little guy will last you long past graduation."
),
"condition": "refurbished",
},
]
schema = (
TextField("$.brand", as_name="brand"),
TextField("$.model", as_name="model"),
TextField("$.description", as_name="description"),
NumericField("$.price", as_name="price"),
TagField("$.condition", as_name="condition"),
)
index = r.ft("idx:bicycle")
index.create_index(
schema,
definition=IndexDefinition(prefix=["bicycle:"], index_type=IndexType.JSON),
)
for bid, bicycle in enumerate(bicycles):
r.json().set(f"bicycle:{bid}", Path.root_path(), bicycle)
res = index.search(Query("*"))
print("Documents found:", res.total)
# >>> Documents found: 10
res = index.search(Query("@model:Jigger"))
print(res)
# >>> Result{1 total, docs: [
# Document {
# 'id': 'bicycle:0',
# 'payload': None,
# 'json': '{
# "brand":"Velorim",
# "model":"Jigger",
# "price":270,
# ...
# "condition":"new"
# }'
# }]}
res = index.search(Query("@model:Jigger").return_field("$.price", as_field="price"))
print(res)
# >>> [Document {'id': 'bicycle:0', 'payload': None, 'price': '270'}]
res = index.search(Query("basic @price:[500 1000]"))
print(res)
# >>> Result{1 total, docs: [
# Document {
# 'id': 'bicycle:5',
# 'payload': None,
# 'json': '{
# "brand":"Breakout",
# "model":"XBN 2.1 Alloy",
# "price":810,
# ...
# "condition":"new"
# }'
# }]}
res = index.search(Query('@brand:"Noka Bikes"'))
print(res)
# >>> Result{1 total, docs: [
# Document {
# 'id': 'bicycle:4',
# 'payload': None,
# 'json': '{
# "brand":"Noka Bikes",
# "model":"Kahuna",
# "price":3200,
# ...
# "condition":"used"
# }'
# }]}
res = index.search(
Query("@description:%analitics%").dialect( # Note the typo in the word "analytics"
2
)
)
print(res)
# >>> Result{1 total, docs: [
# Document {
# 'id': 'bicycle:3',
# 'payload': None,
# 'json': '{
# "brand":"Eva",
# "model":"Eva 291",
# "price":3400,
# "description":"...using analytics from a body metrics database...",
# "condition":"used"
# }'
# }]}
res = index.search(
Query("@description:%%analitycs%%").dialect( # Note 2 typos in the word "analytics"
2
)
)
print(res)
# >>> Result{1 total, docs: [
# Document {
# 'id': 'bicycle:3',
# 'payload': None,
# 'json': '{
# "brand":"Eva",
# "model":"Eva 291",
# "price":3400,
# "description":"...using analytics from a body metrics database...",
# "condition":"used"
# }'
# }]}
res = index.search(Query("@model:hill*"))
print(res)
# >>> Result{1 total, docs: [
# Document {
# 'id': 'bicycle:1',
# 'payload': None,
# 'json': '{
# "brand":"Bicyk",
# "model":"Hillcraft",
# "price":1200,
# ...
# "condition":"used"
# }'
# }]}
res = index.search(Query("@model:*bike"))
print(res)
# >>> Result{1 total, docs: [
# Document {
# 'id': 'bicycle:6',
# 'payload': None,
# 'json': '{
# "brand":"ScramBikes",
# "model":"WattBike",
# "price":2300,
# ...
# "condition":"new"
# }'
# }]}
res = index.search(Query("w'H?*craft'").dialect(2))
print(res.docs[0].json)
# >>> {
# "brand":"Bicyk",
# "model":"Hillcraft",
# "price":1200,
# ...
# "condition":"used"
# }
res = index.search(Query("mountain").with_scores())
for sr in res.docs:
print(f"{sr.id}: score={sr.score}")
res = index.search(Query("mountain").with_scores().scorer("BM25"))
for sr in res.docs:
print(f"{sr.id}: score={sr.score}")
req = aggregations.AggregateRequest("*").group_by(
"@condition", reducers.count().alias("count")
)
res = index.aggregate(req).rows
print(res)
# >>> [['condition', 'refurbished', 'count', '1'],
# ['condition', 'used', 'count', '4'],
# ['condition', 'new', 'count', '5']]
import { AggregateGroupByReducers, AggregateSteps, createClient, SchemaFieldTypes } from 'redis';
const client = createClient();
client.on('error', err => console.log('Redis Client Error', err));
await client.connect();
const bicycle1 = {
brand: 'Velorim',
model: 'Jigger',
price: 270,
description:
'Small and powerful, the Jigger is the best ' +
'ride for the smallest of tikes! This is the tiniest kids\u2019 ' +
'pedal bike on the market available without a coaster brake, the ' +
'Jigger is the vehicle of choice for the rare tenacious little' +
'rider raring to go.',
condition: 'new'
};
const bicycles = [
bicycle1,
{
brand: 'Bicyk',
model: 'Hillcraft',
price: 1200,
description: 'Kids want to ride with as little weight as possible. Especially on an incline! They may be at the age when a 27.5\" wheel bike is just too clumsy coming off a 24\" bike. The Hillcraft 26 is just the solution they need!',
condition: 'used'
},
{
brand: 'Nord',
model: 'Chook air 5',
price: 815,
description: 'The Chook Air 5 gives kids aged six years and older a durable and uberlight mountain bike for their first experience on tracks and easy cruising through forests and fields. The lower top tube makes it easy to mount and dismount in any situation, giving your kids greater safety on the trails.',
condition: 'used'
},
{
brand: 'Eva',
model: 'Eva 291',
price: 3400,
description: 'The sister company to Nord, Eva launched in 2005 as the first and only women-dedicated bicycle brand. Designed by women for women, allEva bikes are optimized for the feminine physique using analytics from a body metrics database. If you like 29ers, try the Eva 291. It\u2019s a brand new bike for 2022.. This full-suspension, cross-country ride has been designed for velocity. The 291 has 100mm of front and rear travel, a superlight aluminum frame and fast-rolling 29-inch wheels. Yippee!',
condition: 'used'
},
{
brand: 'Noka Bikes',
model: 'Kahuna',
price: 3200,
description: 'Whether you want to try your hand at XC racing or are looking for a lively trail bike that\'s just as inspiring on the climbs as it is over rougher ground, the Wilder is one heck of a bike built specifically for short women. Both the frames and components have been tweaked to include a women\u2019s saddle, different bars and unique colourway.',
condition: 'used'
},
{
brand: 'Breakout',
model: 'XBN 2.1 Alloy',
price: 810,
description: 'The XBN 2.1 Alloy is our entry-level road bike \u2013 but that\u2019s not to say that it\u2019s a basic machine. With an internal weld aluminium frame, a full carbon fork, and the slick-shifting Claris gears from Shimano\u2019s, this is a bike which doesn\u2019t break the bank and delivers craved performance.',
condition: 'new'
},
{
brand: 'ScramBikes',
model: 'WattBike',
price: 2300,
description: 'The WattBike is the best e-bike for people who still feel young at heart. It has a Bafang 1000W mid-drive system and a 48V 17.5AH Samsung Lithium-Ion battery, allowing you to ride for more than 60 miles on one charge. It\u2019s great for tackling hilly terrain or if you just fancy a more leisurely ride. With three working modes, you can choose between E-bike, assisted bicycle, and normal bike modes.',
condition: 'new'
},
{
brand: 'Peaknetic',
model: 'Secto',
price: 430,
description: 'If you struggle with stiff fingers or a kinked neck or back after a few minutes on the road, this lightweight, aluminum bike alleviates those issues and allows you to enjoy the ride. From the ergonomic grips to the lumbar-supporting seat position, the Roll Low-Entry offers incredible comfort. The rear-inclined seat tube facilitates stability by allowing you to put a foot on the ground to balance at a stop, and the low step-over frame makes it accessible for all ability and mobility levels. The saddle is very soft, with a wide back to support your hip joints and a cutout in the center to redistribute that pressure. Rim brakes deliver satisfactory braking control, and the wide tires provide a smooth, stable ride on paved roads and gravel. Rack and fender mounts facilitate setting up the Roll Low-Entry as your preferred commuter, and the BMX-like handlebar offers space for mounting a flashlight, bell, or phone holder.',
condition: 'new'
},
{
brand: 'nHill',
model: 'Summit',
price: 1200,
description: 'This budget mountain bike from nHill performs well both on bike paths and on the trail. The fork with 100mm of travel absorbs rough terrain. Fat Kenda Booster tires give you grip in corners and on wet trails. The Shimano Tourney drivetrain offered enough gears for finding a comfortable pace to ride uphill, and the Tektro hydraulic disc brakes break smoothly. Whether you want an affordable bike that you can take to work, but also take trail in mountains on the weekends or you\u2019re just after a stable, comfortable ride for the bike path, the Summit gives a good value for money.',
condition: 'new'
},
{
model: 'ThrillCycle',
brand: 'BikeShind',
price: 815,
description: 'An artsy, retro-inspired bicycle that\u2019s as functional as it is pretty: The ThrillCycle steel frame offers a smooth ride. A 9-speed drivetrain has enough gears for coasting in the city, but we wouldn\u2019t suggest taking it to the mountains. Fenders protect you from mud, and a rear basket lets you transport groceries, flowers and books. The ThrillCycle comes with a limited lifetime warranty, so this little guy will last you long past graduation.',
condition: 'refurbished'
}
];
const schema = {
'$.brand': {
type: SchemaFieldTypes.TEXT,
SORTABLE: true,
AS: 'brand'
},
'$.model': {
type: SchemaFieldTypes.TEXT,
AS: 'model'
},
'$.description': {
type: SchemaFieldTypes.TEXT,
AS: 'description'
},
'$.price': {
type: SchemaFieldTypes.NUMERIC,
AS: 'price'
},
'$.condition': {
type: SchemaFieldTypes.TAG,
AS: 'condition'
}
};
try {
await client.ft.create('idx:bicycle', schema, {
ON: 'JSON',
PREFIX: 'bicycle:'
});
} catch (e) {
if (e.message === 'Index already exists') {
console.log('Index exists already, skipped creation.');
} else {
// Something went wrong, perhaps RediSearch isn't installed...
console.error(e);
process.exit(1);
}
}
await Promise.all(
bicycles.map((bicycle, i) => client.json.set(`bicycle:${i}`, '$', bicycle))
);
let result = await client.ft.search('idx:bicycle', '*', {
LIMIT: {
from: 0,
size: 10
}
});
console.log(JSON.stringify(result, null, 2));
/*
{
"total": 10,
"documents": ...
}
*/
result = await client.ft.search(
'idx:bicycle',
'@model:Jigger',
{
LIMIT: {
from: 0,
size: 10
}
});
console.log(JSON.stringify(result, null, 2));
/*
{
"total": 1,
"documents": [{
"id": "bicycle:0",
"value": {
"brand": "Velorim",
"model": "Jigger",
"price": 270,
"description": "Small and powerful, the Jigger is the best ride for the smallest of tikes! This is the tiniest kids’ pedal bike on the market available without a coaster brake, the Jigger is the vehicle of choice for the rare tenacious little rider raring to go.",
"condition": "new"
}
}]
}
*/
result = await client.ft.search(
'idx:bicycle',
'@brand:"Noka Bikes"',
{
LIMIT: {
from: 0,
size: 10
}
}
);
console.log(JSON.stringify(result, null, 2));
/*
{
"total": 1,
"documents": [{
"id": "bicycle:4",
"value": {
"brand": "Noka Bikes",
"model": "Kahuna",
"price": 3200,
"description": "Whether you want to try your hand at XC racing or are looking for a lively trail bike that's just as inspiring on the climbs as it is over rougher ground, the Wilder is one heck of a bike built specifically for short women. Both the frames and components have been tweaked to include a women’s saddle, different bars and unique colourway.",
"condition": "used"
}
}]
}
*/
package io.redis.examples;
import java.math.BigDecimal;
import java.util.*;
import redis.clients.jedis.*;
import redis.clients.jedis.exceptions.*;
import redis.clients.jedis.search.*;
import redis.clients.jedis.search.aggr.*;
import redis.clients.jedis.search.schemafields.*;
class Bicycle {
public String brand;
public String model;
public BigDecimal price;
public String description;
public String condition;
public Bicycle(String brand, String model, BigDecimal price, String condition, String description) {
this.brand = brand;
this.model = model;
this.price = price;
this.condition = condition;
this.description = description;
}
}
public class SearchQuickstartExample {
public void run() {
// UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379");
JedisPooled jedis = new JedisPooled("localhost", 6379);
SchemaField[] schema = {
TextField.of("$.brand").as("brand"),
TextField.of("$.model").as("model"),
TextField.of("$.description").as("description"),
NumericField.of("$.price").as("price"),
TagField.of("$.condition").as("condition")
};
jedis.ftCreate("idx:bicycle",
FTCreateParams.createParams()
.on(IndexDataType.JSON)
.addPrefix("bicycle:"),
schema
);
Bicycle[] bicycles = {
new Bicycle(
"Velorim",
"Jigger",
new BigDecimal(270),
"new",
"Small and powerful, the Jigger is the best ride " +
"for the smallest of tikes! This is the tiniest " +
"kids’ pedal bike on the market available without" +
" a coaster brake, the Jigger is the vehicle of " +
"choice for the rare tenacious little rider " +
"raring to go."
),
new Bicycle(
"Bicyk",
"Hillcraft",
new BigDecimal(1200),
"used",
"Kids want to ride with as little weight as possible." +
" Especially on an incline! They may be at the age " +
"when a 27.5 inch wheel bike is just too clumsy coming " +
"off a 24 inch bike. The Hillcraft 26 is just the solution" +
" they need!"
),
new Bicycle(
"Nord",
"Chook air 5",
new BigDecimal(815),
"used",
"The Chook Air 5 gives kids aged six years and older " +
"a durable and uberlight mountain bike for their first" +
" experience on tracks and easy cruising through forests" +
" and fields. The lower top tube makes it easy to mount" +
" and dismount in any situation, giving your kids greater" +
" safety on the trails."
),
new Bicycle(
"Eva",
"Eva 291",
new BigDecimal(3400),
"used",
"The sister company to Nord, Eva launched in 2005 as the" +
" first and only women-dedicated bicycle brand. Designed" +
" by women for women, allEva bikes are optimized for the" +
" feminine physique using analytics from a body metrics" +
" database. If you like 29ers, try the Eva 291. It's a " +
"brand new bike for 2022.. This full-suspension, " +
"cross-country ride has been designed for velocity. The" +
" 291 has 100mm of front and rear travel, a superlight " +
"aluminum frame and fast-rolling 29-inch wheels. Yippee!"
),
new Bicycle(
"Noka Bikes",
"Kahuna",
new BigDecimal(3200),
"used",
"Whether you want to try your hand at XC racing or are " +
"looking for a lively trail bike that's just as inspiring" +
" on the climbs as it is over rougher ground, the Wilder" +
" is one heck of a bike built specifically for short women." +
" Both the frames and components have been tweaked to " +
"include a women’s saddle, different bars and unique " +
"colourway."
),
new Bicycle(
"Breakout",
"XBN 2.1 Alloy",
new BigDecimal(810),
"new",
"The XBN 2.1 Alloy is our entry-level road bike – but that’s" +
" not to say that it’s a basic machine. With an internal " +
"weld aluminium frame, a full carbon fork, and the slick-shifting" +
" Claris gears from Shimano’s, this is a bike which doesn’t" +
" break the bank and delivers craved performance."
),
new Bicycle(
"ScramBikes",
"WattBike",
new BigDecimal(2300),
"new",
"The WattBike is the best e-bike for people who still feel young" +
" at heart. It has a Bafang 1000W mid-drive system and a 48V" +
" 17.5AH Samsung Lithium-Ion battery, allowing you to ride for" +
" more than 60 miles on one charge. It’s great for tackling hilly" +
" terrain or if you just fancy a more leisurely ride. With three" +
" working modes, you can choose between E-bike, assisted bicycle," +
" and normal bike modes."
),
new Bicycle(
"Peaknetic",
"Secto",
new BigDecimal(430),
"new",
"If you struggle with stiff fingers or a kinked neck or back after" +
" a few minutes on the road, this lightweight, aluminum bike" +
" alleviates those issues and allows you to enjoy the ride. From" +
" the ergonomic grips to the lumbar-supporting seat position, the" +
" Roll Low-Entry offers incredible comfort. The rear-inclined seat" +
" tube facilitates stability by allowing you to put a foot on the" +
" ground to balance at a stop, and the low step-over frame makes it" +
" accessible for all ability and mobility levels. The saddle is" +
" very soft, with a wide back to support your hip joints and a" +
" cutout in the center to redistribute that pressure. Rim brakes" +
" deliver satisfactory braking control, and the wide tires provide" +
" a smooth, stable ride on paved roads and gravel. Rack and fender" +
" mounts facilitate setting up the Roll Low-Entry as your preferred" +
" commuter, and the BMX-like handlebar offers space for mounting a" +
" flashlight, bell, or phone holder."
),
new Bicycle(
"nHill",
"Summit",
new BigDecimal(1200),
"new",
"This budget mountain bike from nHill performs well both on bike" +
" paths and on the trail. The fork with 100mm of travel absorbs" +
" rough terrain. Fat Kenda Booster tires give you grip in corners" +
" and on wet trails. The Shimano Tourney drivetrain offered enough" +
" gears for finding a comfortable pace to ride uphill, and the" +
" Tektro hydraulic disc brakes break smoothly. Whether you want an" +
" affordable bike that you can take to work, but also take trail in" +
" mountains on the weekends or you’re just after a stable," +
" comfortable ride for the bike path, the Summit gives a good value" +
" for money."
),
new Bicycle(
"ThrillCycle",
"BikeShind",
new BigDecimal(815),
"refurbished",
"An artsy, retro-inspired bicycle that’s as functional as it is" +
" pretty: The ThrillCycle steel frame offers a smooth ride. A" +
" 9-speed drivetrain has enough gears for coasting in the city, but" +
" we wouldn’t suggest taking it to the mountains. Fenders protect" +
" you from mud, and a rear basket lets you transport groceries," +
" flowers and books. The ThrillCycle comes with a limited lifetime" +
" warranty, so this little guy will last you long past graduation."
),
};
for (int i = 0; i < bicycles.length; i++) {
jedis.jsonSetWithEscape(String.format("bicycle:%d", i), bicycles[i]);
}
Query query1 = new Query("*");
List<Document> result1 = jedis.ftSearch("idx:bicycle", query1).getDocuments();
System.out.println("Documents found:" + result1.size());
// Prints: Documents found: 10
Query query2 = new Query("@model:Jigger");
List<Document> result2 = jedis.ftSearch("idx:bicycle", query2).getDocuments();
System.out.println(result2);
// Prints: [id:bicycle:0, score: 1.0, payload:null,
// properties:[$={"brand":"Velorim","model":"Jigger","price":270,"description":"Small and powerful, the Jigger is the best ride for the smallest of tikes! This is the tiniest kids’ pedal bike on the market available without a coaster brake, the Jigger is the vehicle of choice for the rare tenacious little rider raring to go.","condition":"new"}]]
Query query3 = new Query("@model:Jigger").returnFields("price");
List<Document> result3 = jedis.ftSearch("idx:bicycle", query3).getDocuments();
System.out.println(result3);
// Prints: [id:bicycle:0, score: 1.0, payload:null, properties:[price=270]]
Query query4 = new Query("basic @price:[500 1000]");
List<Document> result4 = jedis.ftSearch("idx:bicycle", query4).getDocuments();
System.out.println(result4);
// Prints: [id:bicycle:5, score: 1.0, payload:null,
// properties:[$={"brand":"Breakout","model":"XBN 2.1 Alloy","price":810,"description":"The XBN 2.1 Alloy is our entry-level road bike – but that’s not to say that it’s a basic machine. With an internal weld aluminium frame, a full carbon fork, and the slick-shifting Claris gears from Shimano’s, this is a bike which doesn’t break the bank and delivers craved performance.","condition":"new"}]]
Query query5 = new Query("@brand:\"Noka Bikes\"");
List<Document> result5 = jedis.ftSearch("idx:bicycle", query5).getDocuments();
System.out.println(result5);
// Prints: [id:bicycle:4, score: 1.0, payload:null,
// properties:[$={"brand":"Noka Bikes","model":"Kahuna","price":3200,"description":"Whether you want to try your hand at XC racing or are looking for a lively trail bike that's just as inspiring on the climbs as it is over rougher ground, the Wilder is one heck of a bike built specifically for short women. Both the frames and components have been tweaked to include a women’s saddle, different bars and unique colourway.","condition":"used"}]]
AggregationBuilder ab = new AggregationBuilder("*").groupBy("@condition",
Reducers.count().as("count"));
AggregationResult ar = jedis.ftAggregate("idx:bicycle", ab);
for (int i = 0; i < ar.getTotalResults(); i++) {
System.out.println(ar.getRow(i).getString("condition") + " - "
+ ar.getRow(i).getString("count"));
}
// Prints:
// refurbished - 1
// used - 5
// new - 4
assertEquals("Validate aggregation results", 3, ar.getTotalResults());
jedis.close();
}
}
using NRedisStack.RedisStackCommands;
using NRedisStack.Search;
using NRedisStack.Search.Aggregation;
using NRedisStack.Search.Literals.Enums;
using NRedisStack.Tests;
using StackExchange.Redis;
public class SearchQuickstartExample
{
[SkipIfRedis(Is.OSSCluster)]
public void run()
{
var redis = ConnectionMultiplexer.Connect("localhost:6379");
var db = redis.GetDatabase();
var ft = db.FT();
var json = db.JSON();
var bike1 = new
{
Brand = "Velorim",
Model = "Jigger",
Price = 270M,
Description = "Small and powerful, the Jigger is the best ride " +
"for the smallest of tikes! This is the tiniest " +
"kids’ pedal bike on the market available without" +
" a coaster brake, the Jigger is the vehicle of " +
"choice for the rare tenacious little rider " +
"raring to go.",
Condition = "used"
};
var bicycles = new object[]
{
bike1,
new
{
Brand = "Bicyk",
Model = "Hillcraft",
Price = 1200M,
Description = "Kids want to ride with as little weight as possible." +
" Especially on an incline! They may be at the age " +
"when a 27.5 inch wheel bike is just too clumsy coming " +
"off a 24 inch bike. The Hillcraft 26 is just the solution" +
" they need!",
Condition = "used",
},
new
{
Brand = "Nord",
Model = "Chook air 5",
Price = 815M,
Description = "The Chook Air 5 gives kids aged six years and older " +
"a durable and uberlight mountain bike for their first" +
" experience on tracks and easy cruising through forests" +
" and fields. The lower top tube makes it easy to mount" +
" and dismount in any situation, giving your kids greater" +
" safety on the trails.",
Condition = "used",
},
new
{
Brand = "Eva",
Model = "Eva 291",
Price = 3400M,
Description = "The sister company to Nord, Eva launched in 2005 as the" +
" first and only women-dedicated bicycle brand. Designed" +
" by women for women, allEva bikes are optimized for the" +
" feminine physique using analytics from a body metrics" +
" database. If you like 29ers, try the Eva 291. It’s a " +
"brand new bike for 2022.. This full-suspension, " +
"cross-country ride has been designed for velocity. The" +
" 291 has 100mm of front and rear travel, a superlight " +
"aluminum frame and fast-rolling 29-inch wheels. Yippee!",
Condition = "used",
},
new
{
Brand = "Noka Bikes",
Model = "Kahuna",
Price = 3200M,
Description = "Whether you want to try your hand at XC racing or are " +
"looking for a lively trail bike that's just as inspiring" +
" on the climbs as it is over rougher ground, the Wilder" +
" is one heck of a bike built specifically for short women." +
" Both the frames and components have been tweaked to " +
"include a women’s saddle, different bars and unique " +
"colourway.",
Condition = "used",
},
new
{
Brand = "Breakout",
Model = "XBN 2.1 Alloy",
Price = 810M,
Description = "The XBN 2.1 Alloy is our entry-level road bike – but that’s" +
" not to say that it’s a basic machine. With an internal " +
"weld aluminium frame, a full carbon fork, and the slick-shifting" +
" Claris gears from Shimano’s, this is a bike which doesn’t" +
" break the bank and delivers craved performance.",
Condition = "new",
},
new
{
Brand = "ScramBikes",
Model = "WattBike",
Price = 2300M,
Description = "The WattBike is the best e-bike for people who still feel young" +
" at heart. It has a Bafang 1000W mid-drive system and a 48V" +
" 17.5AH Samsung Lithium-Ion battery, allowing you to ride for" +
" more than 60 miles on one charge. It’s great for tackling hilly" +
" terrain or if you just fancy a more leisurely ride. With three" +
" working modes, you can choose between E-bike, assisted bicycle," +
" and normal bike modes.",
Condition = "new",
},
new
{
Brand = "Peaknetic",
Model = "Secto",
Price = 430M,
Description = "If you struggle with stiff fingers or a kinked neck or back after" +
" a few minutes on the road, this lightweight, aluminum bike" +
" alleviates those issues and allows you to enjoy the ride. From" +
" the ergonomic grips to the lumbar-supporting seat position, the" +
" Roll Low-Entry offers incredible comfort. The rear-inclined seat" +
" tube facilitates stability by allowing you to put a foot on the" +
" ground to balance at a stop, and the low step-over frame makes it" +
" accessible for all ability and mobility levels. The saddle is" +
" very soft, with a wide back to support your hip joints and a" +
" cutout in the center to redistribute that pressure. Rim brakes" +
" deliver satisfactory braking control, and the wide tires provide" +
" a smooth, stable ride on paved roads and gravel. Rack and fender" +
" mounts facilitate setting up the Roll Low-Entry as your preferred" +
" commuter, and the BMX-like handlebar offers space for mounting a" +
" flashlight, bell, or phone holder.",
Condition = "new",
},
new
{
Brand = "nHill",
Model = "Summit",
Price = 1200M,
Description = "This budget mountain bike from nHill performs well both on bike" +
" paths and on the trail. The fork with 100mm of travel absorbs" +
" rough terrain. Fat Kenda Booster tires give you grip in corners" +
" and on wet trails. The Shimano Tourney drivetrain offered enough" +
" gears for finding a comfortable pace to ride uphill, and the" +
" Tektro hydraulic disc brakes break smoothly. Whether you want an" +
" affordable bike that you can take to work, but also take trail in" +
" mountains on the weekends or you’re just after a stable," +
" comfortable ride for the bike path, the Summit gives a good value" +
" for money.",
Condition = "new",
},
new
{
Model = "ThrillCycle",
Brand = "BikeShind",
Price = 815M,
Description = "An artsy, retro-inspired bicycle that’s as functional as it is" +
" pretty: The ThrillCycle steel frame offers a smooth ride. A" +
" 9-speed drivetrain has enough gears for coasting in the city, but" +
" we wouldn’t suggest taking it to the mountains. Fenders protect" +
" you from mud, and a rear basket lets you transport groceries," +
" flowers and books. The ThrillCycle comes with a limited lifetime" +
" warranty, so this little guy will last you long past graduation.",
Condition = "refurbished",
},
};
var schema = new Schema()
.AddTextField(new FieldName("$.Brand", "Brand"))
.AddTextField(new FieldName("$.Model", "Model"))
.AddTextField(new FieldName("$.Description", "Description"))
.AddNumericField(new FieldName("$.Price", "Price"))
.AddTagField(new FieldName("$.Condition", "Condition"));
ft.Create(
"idx:bicycle",
new FTCreateParams().On(IndexDataType.JSON).Prefix("bicycle:"),
schema);
for (int i = 0; i < bicycles.Length; i++)
{
json.Set($"bicycle:{i}", "$", bicycles[i]);
}
var query1 = new Query("*");
var res1 = ft.Search("idx:bicycle", query1).Documents;
Console.WriteLine(string.Join("\n", res1.Count()));
// Prints: Documents found: 10
var query2 = new Query("@Model:Jigger");
var res2 = ft.Search("idx:bicycle", query2).Documents;
Console.WriteLine(string.Join("\n", res2.Select(x => x["json"])));
// Prints: {"Brand":"Moore PLC","Model":"Award Race","Price":3790.76,
// "Description":"This olive folding bike features a carbon frame
// and 27.5 inch wheels. This folding bike is perfect for compact
// storage and transportation.","Condition":"new"}
var query3 = new Query("basic @Price:[500 1000]");
var res3 = ft.Search("idx:bicycle", query3).Documents;
Console.WriteLine(string.Join("\n", res3.Select(x => x["json"])));
// Prints: {"Brand":"Moore PLC","Model":"Award Race","Price":3790.76,
// "Description":"This olive folding bike features a carbon frame
// and 27.5 inch wheels. This folding bike is perfect for compact
// storage and transportation.","Condition":"new"}
var query4 = new Query("@Brand:\"Noka Bikes\"");
var res4 = ft.Search("idx:bicycle", query4).Documents;
Console.WriteLine(string.Join("\n", res4.Select(x => x["json"])));
// Prints: {"Brand":"Moore PLC","Model":"Award Race","Price":3790.76,
// "Description":"This olive folding bike features a carbon frame
// and 27.5 inch wheels. This folding bike is perfect for compact
// storage and transportation.","Condition":"new"}
var query5 = new Query("@Model:Jigger").ReturnFields("Price");
var res5 = ft.Search("idx:bicycle", query5).Documents;
Console.WriteLine(res5.First()["Price"]);
// Prints: 270
var request = new AggregationRequest("*").GroupBy(
"@Condition", Reducers.Count().As("Count"));
var result = ft.Aggregate("idx:bicycle", request);
for (var i = 0; i < result.TotalResults; i++)
{
var row = result.GetRow(i);
Console.WriteLine($"{row["Condition"]} - {row["Count"]}");
}
// Prints:
// refurbished - 1
// used - 5
// new - 4
}
}提示：
您可以从 Redis Cloud 数据库配置页面复制并粘贴连接详细信息。以下是托管在 AWS 区域us-east-1并侦听端口 16379 的 Cloud 数据库的示例连接字符串：redis-16379.c283.us-east-1-4.ec2.cloud.redislabs.com:16379。连接字符串的格式为host:port。您还必须复制并粘贴 Cloud 数据库的用户名和密码，然后将凭据传递给客户端或在建立连接后使用AUTH 命令。存储和检索数据
Redis 代表远程字典服务器。您可以在 Redis 中的服务器端使用与本地编程环境中相同的数据类型。
与字节数组类似，Redis 字符串存储字节序列，包括文本、序列化对象、计数器值和二进制数组。以下示例展示了如何设置和获取字符串值：
SET bike:1 "Process 134"
GET bike:1您是否厌倦了使用 redis-cli？尝试 Redis Insight - Redis 的开发人员 GUI。
"""
Code samples for data structure store quickstart pages:
https://redis.github.net.cn/docs/latest/develop/get-started/data-store/
"""
import redis
r = redis.Redis(host="localhost", port=6379, db=0, decode_responses=True)
res = r.set("bike:1", "Process 134")
print(res)
# >>> True
res = r.get("bike:1")
print(res)
# >>> "Process 134"
package io.redis.examples;
import redis.clients.jedis.UnifiedJedis;
public class SetGetExample {
public void run() {
UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379");
String status = jedis.set("bike:1", "Process 134");
if ("OK".equals(status)) System.out.println("Successfully added a bike.");
String value = jedis.get("bike:1");
if (value != null) System.out.println("The name of the bike is: " + value + ".");
}
}
package example_commands_test
import (
"context"
"fmt"
"github.com/redis/go-redis/v9"
)
func ExampleClient_Set_and_get() {
ctx := context.Background()
rdb := redis.NewClient(&redis.Options{
Addr: "localhost:6379",
Password: "", // no password docs
DB: 0, // use default DB
})
err := rdb.Set(ctx, "bike:1", "Process 134", 0).Err()
if err != nil {
panic(err)
}
fmt.Println("OK")
value, err := rdb.Get(ctx, "bike:1").Result()
if err != nil {
panic(err)
}
fmt.Printf("The name of the bike is %s", value)
}
using NRedisStack.Tests;
using StackExchange.Redis;
public class SetGetExample
{
[SkipIfRedis(Is.OSSCluster)]
public void run()
{
var redis = ConnectionMultiplexer.Connect("localhost:6379");
var db = redis.GetDatabase();
bool status = db.StringSet("bike:1", "Process 134");
if (status)
Console.WriteLine("Successfully added a bike.");
var value = db.StringGet("bike:1");
if (value.HasValue)
Console.WriteLine("The name of the bike is: " + value + ".");
}
}
哈希相当于字典（dict 或哈希映射）。除其他用途外，您还可以使用哈希来表示普通对象并存储计数器分组。以下示例说明如何设置和访问对象的字段值：
> HSET bike:1 model Deimos brand Ergonom type 'Enduro bikes' price 4972
(integer) 4
> HGET bike:1 model
"Deimos"
> HGET bike:1 price
"4972"
> HGETALL bike:1
1) "model"
2) "Deimos"
3) "brand"
4) "Ergonom"
5) "type"
6) "Enduro bikes"
7) "price"
8) "4972"您是否厌倦了使用 redis-cli？尝试 Redis Insight - Redis 的开发人员 GUI。
"""
Code samples for Hash doc pages:
https://redis.github.net.cn/docs/latest/develop/data-types/hashes/
"""
import redis
r = redis.Redis(decode_responses=True)
res1 = r.hset(
"bike:1",
mapping={
"model": "Deimos",
"brand": "Ergonom",
"type": "Enduro bikes",
"price": 4972,
},
)
print(res1)
# >>> 4
res2 = r.hget("bike:1", "model")
print(res2)
# >>> 'Deimos'
res3 = r.hget("bike:1", "price")
print(res3)
# >>> '4972'
res4 = r.hgetall("bike:1")
print(res4)
# >>> {'model': 'Deimos', 'brand': 'Ergonom', 'type': 'Enduro bikes', 'price': '4972'}
res5 = r.hmget("bike:1", ["model", "price"])
print(res5)
# >>> ['Deimos', '4972']
res6 = r.hincrby("bike:1", "price", 100)
print(res6)
# >>> 5072
res7 = r.hincrby("bike:1", "price", -100)
print(res7)
# >>> 4972
res11 = r.hincrby("bike:1:stats", "rides", 1)
print(res11)
# >>> 1
res12 = r.hincrby("bike:1:stats", "rides", 1)
print(res12)
# >>> 2
res13 = r.hincrby("bike:1:stats", "rides", 1)
print(res13)
# >>> 3
res14 = r.hincrby("bike:1:stats", "crashes", 1)
print(res14)
# >>> 1
res15 = r.hincrby("bike:1:stats", "owners", 1)
print(res15)
# >>> 1
res16 = r.hget("bike:1:stats", "rides")
print(res16)
# >>> 3
res17 = r.hmget("bike:1:stats", ["crashes", "owners"])
print(res17)
# >>> ['1', '1']
import assert from 'assert';
import { createClient } from 'redis';
const client = createClient();
await client.connect();
const res1 = await client.hSet(
'bike:1',
{
'model': 'Deimos',
'brand': 'Ergonom',
'type': 'Enduro bikes',
'price': 4972,
}
)
console.log(res1) // 4
const res2 = await client.hGet('bike:1', 'model')
console.log(res2) // 'Deimos'
const res3 = await client.hGet('bike:1', 'price')
console.log(res3) // '4972'
const res4 = await client.hGetAll('bike:1')
console.log(res4)
/*
{
brand: 'Ergonom',
model: 'Deimos',
price: '4972',
type: 'Enduro bikes'
}
*/
const res5 = await client.hmGet('bike:1', ['model', 'price'])
console.log(res5) // ['Deimos', '4972']
const res6 = await client.hIncrBy('bike:1', 'price', 100)
console.log(res6) // 5072
const res7 = await client.hIncrBy('bike:1', 'price', -100)
console.log(res7) // 4972
const res11 = await client.hIncrBy('bike:1:stats', 'rides', 1)
console.log(res11) // 1
const res12 = await client.hIncrBy('bike:1:stats', 'rides', 1)
console.log(res12) // 2
const res13 = await client.hIncrBy('bike:1:stats', 'rides', 1)
console.log(res13) // 3
const res14 = await client.hIncrBy('bike:1:stats', 'crashes', 1)
console.log(res14) // 1
const res15 = await client.hIncrBy('bike:1:stats', 'owners', 1)
console.log(res15) // 1
const res16 = await client.hGet('bike:1:stats', 'rides')
console.log(res16) // 3
const res17 = await client.hmGet('bike:1:stats', ['crashes', 'owners'])
console.log(res17) // ['1', '1']
package io.redis.examples;
import redis.clients.jedis.UnifiedJedis;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class HashExample {
public void run() {
try (UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379")) {
Map<String, String> bike1 = new HashMap<>();
bike1.put("model", "Deimos");
bike1.put("brand", "Ergonom");
bike1.put("type", "Enduro bikes");
bike1.put("price", "4972");
Long res1 = jedis.hset("bike:1", bike1);
System.out.println(res1); // 4
String res2 = jedis.hget("bike:1", "model");
System.out.println(res2); // Deimos
String res3 = jedis.hget("bike:1", "price");
System.out.println(res3); // 4972
Map<String, String> res4 = jedis.hgetAll("bike:1");
System.out.println(res4); // {type=Enduro bikes, brand=Ergonom, price=4972, model=Deimos}
List<String> res5 = jedis.hmget("bike:1", "model", "price");
System.out.println(res5); // [Deimos, 4972]
Long res6 = jedis.hincrBy("bike:1", "price", 100);
System.out.println(res6); // 5072
Long res7 = jedis.hincrBy("bike:1", "price", -100);
System.out.println(res7); // 4972
Long res8 = jedis.hincrBy("bike:1:stats", "rides", 1);
System.out.println(res8); // 1
Long res9 = jedis.hincrBy("bike:1:stats", "rides", 1);
System.out.println(res9); // 2
Long res10 = jedis.hincrBy("bike:1:stats", "rides", 1);
System.out.println(res10); // 3
Long res11 = jedis.hincrBy("bike:1:stats", "crashes", 1);
System.out.println(res11); // 1
Long res12 = jedis.hincrBy("bike:1:stats", "owners", 1);
System.out.println(res12); // 1
String res13 = jedis.hget("bike:1:stats", "rides");
System.out.println(res13); // 3
List<String> res14 = jedis.hmget("bike:1:stats", "crashes", "owners");
System.out.println(res14); // [1, 1]
}
}
}
using NRedisStack.Tests;
using StackExchange.Redis;
public class HashExample
{
[SkipIfRedis(Is.OSSCluster)]
public void run()
{
var muxer = ConnectionMultiplexer.Connect("localhost:6379");
var db = muxer.GetDatabase();
db.KeyDelete("bike:1");
db.HashSet("bike:1", new HashEntry[]
{
new HashEntry("model", "Deimos"),
new HashEntry("brand", "Ergonom"),
new HashEntry("type", "Enduro bikes"),
new HashEntry("price", 4972)
});
Console.WriteLine("Hash Created");
// Hash Created
var model = db.HashGet("bike:1", "model");
Console.WriteLine($"Model: {model}");
// Model: Deimos
var price = db.HashGet("bike:1", "price");
Console.WriteLine($"Price: {price}");
// Price: 4972
var bike = db.HashGetAll("bike:1");
Console.WriteLine("bike:1");
Console.WriteLine(string.Join("\n", bike.Select(b => $"{b.Name}: {b.Value}")));
// Bike:1:
// model: Deimos
// brand: Ergonom
// type: Enduro bikes
// price: 4972
var values = db.HashGet("bike:1", new RedisValue[] { "model", "price" });
Console.WriteLine(string.Join(" ", values));
// Deimos 4972
var newPrice = db.HashIncrement("bike:1", "price", 100);
Console.WriteLine($"New price: {newPrice}");
// New price: 5072
newPrice = db.HashIncrement("bike:1", "price", -100);
Console.WriteLine($"New price: {newPrice}");
// New price: 4972
var rides = db.HashIncrement("bike:1", "rides");
Console.WriteLine($"Rides: {rides}");
// Rides: 1
rides = db.HashIncrement("bike:1", "rides");
Console.WriteLine($"Rides: {rides}");
// Rides: 2
rides = db.HashIncrement("bike:1", "rides");
Console.WriteLine($"Rides: {rides}");
// Rides: 3
var crashes = db.HashIncrement("bike:1", "crashes");
Console.WriteLine($"Crashes: {crashes}");
// Crashes: 1
var owners = db.HashIncrement("bike:1", "owners");
Console.WriteLine($"Owners: {owners}");
// Owners: 1
var stats = db.HashGet("bike:1", new RedisValue[] { "crashes", "owners" });
Console.WriteLine($"Bike stats: crashes={stats[0]}, owners={stats[1]}");
// Bike stats: crashes=1, owners=1
}
}
您可以在本文档站点的数据类型部分获得可用数据类型的完整概述。每种数据类型都有允许您操作或检索数据的命令。命令参考提供了详细的解释。
扫描键空间
Redis 中的每个项目都有一个唯一的键。所有项目都存在于 Redis键空间中。您可以通过SCAN 命令扫描 Redis 键空间。以下是扫描前 100 个具有前缀的键的示例bike:：
SCAN 0 MATCH "bike:*" COUNT 100
SCAN返回一个光标位置，允许您迭代扫描下一批键，直到达到光标值 0。
后续步骤Next steps
通过了解 Redis Stack，您可以解决 Redis 的更多用例。以下是另外两个快速入门指南：