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电影推荐

简介

本文使用小笨羊推荐应用和服务,对MovieLens数据,端到端的搭建完整的电影推荐网站。

演示网址: https://app.aboutdata.top/movie/#/movie

小笨羊网址: https://xiaobenyang.com/

如有问题,请联系小笨羊微信:

具体内容如下,

  • 首页,包括热门排行榜和猜你喜欢,


  • 电影信息页,包含电影信息,"电影评分详情"和"看了又看"(推荐相似电影)。


  • 按照电影平均打分,查询高分电影



搭建一套完整的电影推荐网站,需要下面功能,

模型

功能

排行榜

热门电影排行榜

训练U2I模型

用于用户登录后的首页推荐

训练I2I模型

用户进入电影页面之后推荐

查询模型1

按打分查询电影

查询模型2

按电影 查询用户电影评分.


第一步,准备数据

MovieLens是推荐系统的经典数据集,包含用户对电影的打分,用户信息,电影信息等数据。

第一步, 准备三个数据,分别是用户表,物品表(电影),行为表(用户对电影的打分)

1. 用户表

用户表存放的是用户的相关信息,包括性别、年龄、职业。

列名

类型

描述

备注

user_id

long

用户ID

age

int

年龄

数值特征

gender

string

性别

类别特征: M代表男性,F代表女性

occupation

string

职业

类别特征:20中种职业

zip_code

string

邮政编码

‌前两位数字‌:代表省级行政区,

中间两位数字‌:代表地级行政区。

可以用邮政编码抽取处理特征。同样还有地址抽取,ip抽取等和位置相关的特征

1.1. 使用AlinkLab查看数据

1.2. 使用AlinkLab查看统计信息

2. 物品表

物品表存放的是电影的相关信息,即电影id、电影标题、电影类型

列名

类型

描述

movie_id

long

电影ID

title

string

电影名称,语义进入精排模型

release_date

string

发布日期

video_release_date

string

视频发布日期

imdb_url

string

链接

其他列是影片类型

int

OneHot之后的数据: 如果是此类影片值是1, 不是值是0。不需要再进行数据处理,直接进入模型即可。


2.1. 使用AlinkLab查看数据

2.2. 使用AlinkLab查看统计信息


3. 行为表

行为表是打分数据,包含用户id、电影id、该用户对此电影的评分、时间。

列名

类型

描述

user_id

long

用户ID

movie_id

long

电影ID

rating

float

打分

ts

long

打分时间,以秒为单位的时间戳; 可用来构造用户的序列行为特征,即用户最近n次的打分行为。


3.1. 使用AlinkLab查看数据

3.2. 使用AlinkLab查看统计信息



第二步,训练模型

一共需要如下五个模型:

模型

描述

排行榜

热门电影排行榜

训练U2I模型

用于用户登录后的首页推荐

训练I2I模型

用户进入电影页面之后推荐

查询模型1

按打分查询电影

查询模型2

按电影 查询用户电影评分.

1. 排行榜

一般电影推荐网页的首页,会有热门电影排行榜和猜你喜欢两部分。榜单可以非常丰富,按照类别的榜单,按照性别的榜单,按照地域的榜单,不同类别之间的对比等等。

下图例子中的右侧是按照播放次数倒排的电影排行榜。


可以直接用1.1导入教程示例查看使用,也可以按照1.2的步骤直接训练模型。

1.1. 导入任务

可以直接导入教程示例查看使用,也可以按照1.2的步骤训练模型。

任务帖子链接:https://xiaobenyang.com/discuss-post?id=134

点击"导入",将任务导入自己的项目直接查看。

1.2. 训练步骤

使用排行榜应用训练模型

  • 计算表是行为表(电影打分表), 附加表是物品表(电影信息表)。 计算出打分最多的10个电影, 结果包括电影ID, 电影名称和点评次数。

  • 填写参数

参数介绍:

参数

取值

介绍

主体列

movie_id

按照电影ID做汇总

计算列

rating

计算打分(rating)的次数(count),用于排名

统计类型

count

是否降序

排名按照降序排序

个数

10

返回排名前10的数据

附加列

["title"]

除了返回统计量之外,也返回title(电影标题列)

预测服务名称

应用示例/电影/排行榜B


  • 填写好参数之后,点击运行。
  • 运行成功之后,查看对应服务,点击"预测演示"测试。并查询对应的服务ID。

1.3. API调用

以Vue为例,

var axios = require('axios')
  
//设置小笨羊API访问URL
axios.defaults.baseURL = 'https://xiaobenyang.com/pred'
  
// 设置访问ApiKey, 在管理页面查询https://xiaobenyang.com/calc?func=LabPage&proc=ListMyApikey
axios.defaults.headers.common['APIKEY'] = '*'

axios.post(null, {
        'predServId': '40',
        'clause': ''
})


参数介绍

参数

描述

介绍

predServId

服务ID

在服务列表里查询

clause

表达式

''是所有数据

1.4. 请求结果

[
  {
    "pred": "[{\"rank\":1,\"movie_id\":50,\"title\":\"Star Wars (1977)\",\"rating_count\":583.0},{\"rank\":2,\"movie_id\":258,\"title\":\"Contact (1997)\",\"rating_count\":509.0},{\"rank\":3,\"movie_id\":100,\"title\":\"Fargo (1996)\",\"rating_count\":508.0},{\"rank\":4,\"movie_id\":181,\"title\":\"Return of the Jedi (1983)\",\"rating_count\":507.0},{\"rank\":5,\"movie_id\":294,\"title\":\"Liar Liar (1997)\",\"rating_count\":485.0},{\"rank\":6,\"movie_id\":286,\"title\":\"English Patient, The (1996)\",\"rating_count\":481.0},{\"rank\":7,\"movie_id\":288,\"title\":\"Scream (1996)\",\"rating_count\":478.0},{\"rank\":8,\"movie_id\":1,\"title\":\"Toy Story (1995)\",\"rating_count\":452.0},{\"rank\":9,\"movie_id\":300,\"title\":\"Air Force One (1997)\",\"rating_count\":431.0},{\"rank\":10,\"movie_id\":121,\"title\":\"Independence Day (ID4) (1996)\",\"rating_count\":429.0}]",
    "__alink_lookup_id__": 0
  }
]

2. 首页推荐(猜你喜欢)

首页推荐,也就是猜你喜欢,用来推荐用户感兴趣的电影。使用热门召回和ALS召回,解决冷启动和个性化推荐的需求。这部分用户上来就会看到,非常重要。下图左侧是猜你喜欢的示例,

2.1. 导入任务

可以直接导入教程示例查看使用,也可以按照1.2的步骤训练模型。

任务帖子链接:https://xiaobenyang.com/discuss-post?id=133

点击"导入",将任务导入自己的项目查看。

2.2. 训练和部署

这里使用推荐系统应用训练模型,包含召回和精排

  • 数据
    • 召回训练数据是行为表(电影打分表)
    • 精排训练数据是行为表(电影打分表), 标签设置为"rating>=4"(打分大于等于4是正样本,其他是负样本)
    • 用户数据是用户表
    • 物品数据是电影表

这里使用了同一个行为表作为召回和精排的训练数据,实际应用中召回训练数据和精排训练数据是不同的,需要根据业务情况精心设计负样本。召回一般用随机采样全部行为作为负样本,精排一般是用曝光之后没有点击(评分)作为负样本。

  • 填写参数,确定召回和排序的方式
  • 运行和部署

2.3. API调用

以Vue为例,设置user_id

var axios = require('axios')
  
// 设置小笨羊API访问URL
axios.defaults.baseURL = 'https://xiaobenyang.com/pred'
  
// 设置访问ApiKey, 在管理页面查询https://xiaobenyang.com/calc?func=LabPage&proc=ListMyApikey
axios.defaults.headers.common['APIKEY'] = '*'

axios.post(null, {
        'predServId': '39',
        'user_id': userId
})

参数介绍

参数

描述

介绍

predServId

服务ID

在服务列表里查询

user_id

用户ID

2.4. 请求结果

[
  {
    "score": 0.6648386815137506,
    "user_id": 22,
    "imdb_url": "http://us.imdb.com/M/title-exact?Usual%20Suspects,%20The%20(1995)",
    "movie_id": 12,
    "title": "Usual Suspects, The (1995)"
  },
  {
    "score": 0.6563065434252864,
    "user_id": 22,
    "imdb_url": "http://us.imdb.com/M/title-exact?Star%20Wars%20(1977)",
    "movie_id": 50,
    "title": "Star Wars (1977)"
  },
  {
    "score": 0.6282466883685336,
    "user_id": 22,
    "imdb_url": "http://us.imdb.com/M/title-exact?Empire%20Strikes%20Back,%20The%20(1980)",
    "movie_id": 172,
    "title": "Empire Strikes Back, The (1980)"
  },
  {
    "score": 0.6280127697511231,
    "user_id": 22,
    "imdb_url": "http://us.imdb.com/M/title-exact?Princess%20Bride,%20The%20(1987)",
    "movie_id": 173,
    "title": "Princess Bride, The (1987)"
  },
  {
    "score": 0.6277787911507777,
    "user_id": 22,
    "imdb_url": "http://us.imdb.com/M/title-exact?Raiders%20of%20the%20Lost%20Ark%20(1981)",
    "movie_id": 174,
    "title": "Raiders of the Lost Ark (1981)"
  },
  {
    "score": 0.6256703001101849,
    "user_id": 22,
    "imdb_url": "http://us.imdb.com/M/title-exact?Alien%20(1979)",
    "movie_id": 183,
    "title": "Alien (1979)"
  },
  {
    "score": 0.33804561940672695,
    "user_id": 22,
    "imdb_url": "http://us.imdb.com/M/title-exact?Faust%20%281994%29",
    "movie_id": 1367,
    "title": "Faust (1994)"
  },
  {
    "score": 0.3168786077333079,
    "user_id": 22,
    "imdb_url": "http://us.imdb.com/M/title-exact?imdb-title-118764",
    "movie_id": 1463,
    "title": "Boys, Les (1997)"
  },
  {
    "score": 0.30891279055970633,
    "user_id": 22,
    "imdb_url": "http://us.imdb.com/M/title-exact?Santa%20with%20Muscles%20(1996)",
    "movie_id": 1500,
    "title": "Santa with Muscles (1996)"
  },
  {
    "score": 0.27920416768385836,
    "user_id": 22,
    "imdb_url": "http://us.imdb.com/Title?Angel+Baby+(1995/I)",
    "movie_id": 1643,
    "title": "Angel Baby (1995)"
  }
]


3. 进入电影详情页,特别推荐电影

指定电影ID, 推荐相似的电影

3.1. 导入任务

可以直接导入教程示例查看使用,也可以按照1.2的步骤训练模型。

任务帖子链接:https://xiaobenyang.com/discuss-post?id=135

点击"导入",将任务导入自己的项目查看。

3.2. 训练和部署

  • 使用I2I应用训练模型,数据表是行为表(电影打分表), 附加表是物品表(电影信息表)。 给定一个电影,推荐相似的电影列表。
  • 填写参数

  • 运行和部署

3.3. API调用

以Vue为例,设置movie_id, 推荐相似电影列表,并关联电影信息

var axios = require('axios')
  
//设置小笨羊API访问URL
axios.defaults.baseURL = 'https://xiaobenyang.com/pred'
  
// 设置访问ApiKey, 在管理页面查询https://xiaobenyang.com/calc?func=LabPage&proc=ListMyApikey
axios.defaults.headers.common['APIKEY'] = '*'

axios.post(null, {
            'predServId': '43',
            "movie_id": this.movieId
})


3.4. 请求结果

{
    "recom": "[{\"score\":3.739997579363967,\"movie_id\":173,\"title\":\"Princess Bride, The (1987)\"},{\"score\":3.715278204571951,\"movie_id\":169,\"title\":\"Wrong Trousers, The (1993)\"},{\"score\":3.69654889421144,\"movie_id\":1169,\"title\":\"Fresh (1994)\"},{\"score\":3.666642062382044,\"movie_id\":64,\"title\":\"Shawshank Redemption, The (1994)\"},{\"score\":3.633121867118959,\"movie_id\":114,\"title\":\"Wallace & Gromit: The Best of Aardman Animation (1996)\"},{\"score\":3.632576019023612,\"movie_id\":318,\"title\":\"Schindler's List (1993)\"},{\"score\":3.6205990685449594,\"movie_id\":174,\"title\":\"Raiders of the Lost Ark (1981)\"},{\"score\":3.6162683197891154,\"movie_id\":408,\"title\":\"Close Shave, A (1995)\"},{\"score\":3.604905994911123,\"movie_id\":50,\"title\":\"Star Wars (1977)\"},{\"score\":3.5979400813672933,\"movie_id\":613,\"title\":\"My Man Godfrey (1936)\"}]",
    "movie_id": 2
}


4. 按打分查询模型

这是"统计和查询"模型, 查询电影所有的评分记录

4.1. 导入任务

可以直接导入教程示例查看使用,也可以按照1.2的步骤训练模型。

任务帖子链接:https://xiaobenyang.com/discuss-post?id=132

点击"导入",将任务导入自己的项目查看。

4.2. 训练和部署

  • 使用"统计和查询"应用, 待统计表是行为表(电影评分表),计算每个电影的评分;附加特征表是物品表(电影信息表), 用于关联物品特征; 结果统计表的统计值,并关联附加特征表的特征。


  • 填写参数

4.3. API调用

指定电影平均分和打分次数, 搜索所有满足条件的电影,并关联电影信息(电影名称和电影类型)

var axios = require('axios')
  
//设置小笨羊API访问URL
axios.defaults.baseURL = 'https://xiaobenyang.com/pred'
  
// 设置访问ApiKey, 在管理页面查询https://xiaobenyang.com/calc?func=LabPage&proc=ListMyApikey
axios.defaults.headers.common['APIKEY'] = '*'

axios.post(null, {
    'predServId': '41',
    'clause': 'movie_id=' + this.movieId
})

4.4. 请求结果

{
    "clause": "movie_id=2",
    "pred": "[{\"user_id\":5,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":875636053},{\"user_id\":268,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":875744173},{\"user_id\":276,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":874792436},{\"user_id\":217,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":889069782},{\"user_id\":87,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":879876074},{\"user_id\":250,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":878090414},{\"user_id\":201,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":884112487},{\"user_id\":64,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":889737609},{\"user_id\":13,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882397650},{\"user_id\":95,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":888955909},{\"user_id\":213,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":878955914},{\"user_id\":373,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":877100416},{\"user_id\":293,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":888907101},{\"user_id\":193,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":890860198},{\"user_id\":363,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":891495809},{\"user_id\":256,\"rating\":5.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882164480},{\"user_id\":200,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":884130046},{\"user_id\":207,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":877822770},{\"user_id\":393,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":887746206},{\"user_id\":222,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":878183837},{\"user_id\":399,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882512708},{\"user_id\":301,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882076587},{\"user_id\":379,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":880525540},{\"user_id\":387,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":886483195},{\"user_id\":92,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":875653699},{\"user_id\":450,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882474001},{\"user_id\":303,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":879467191},{\"user_id\":178,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882827375},{\"user_id\":83,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":881971771},{\"user_id\":407,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":875553509},{\"user_id\":327,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":887820385},{\"user_id\":1,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":876893171},{\"user_id\":325,\"rating\":1.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":891478772},{\"user_id\":455,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":879111786},{\"user_id\":30,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":875061066},{\"user_id\":320,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":884749281},{\"user_id\":405,\"rating\":1.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":885547953},{\"user_id\":466,\"rating\":1.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":890284819},{\"user_id\":536,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882360227},{\"user_id\":346,\"rating\":5.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":875263473},{\"user_id\":197,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":891409981},{\"user_id\":72,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":880037376},{\"user_id\":110,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":886988536},{\"user_id\":600,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":888451908},{\"user_id\":622,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882671363},{\"user_id\":551,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":892784780},{\"user_id\":618,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":891309091},{\"user_id\":495,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye 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(1995)\",\"ts\":892790676},{\"user_id\":709,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":879848511},{\"user_id\":416,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":886317115},{\"user_id\":561,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":885809752},{\"user_id\":292,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":881105778},{\"user_id\":305,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":886324580},{\"user_id\":521,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":886063310},{\"user_id\":249,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":879641284},{\"user_id\":727,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye 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(1995)\",\"ts\":888801522},{\"user_id\":764,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":876244856},{\"user_id\":844,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":877387933},{\"user_id\":632,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":879459505},{\"user_id\":671,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":884035892},{\"user_id\":943,\"rating\":5.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":888639953},{\"user_id\":267,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":878972463},{\"user_id\":826,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":885690713},{\"user_id\":650,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye 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(1995)\",\"ts\":888069606},{\"user_id\":807,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":892978338},{\"user_id\":886,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":876033368},{\"user_id\":889,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":880182460}]"
}


5. 按电影查询用户电影评分详情

这是"统计和查询"模型, 查询电影所有的评分记录

5.1. 导入任务

可以直接导入教程示例查看使用,也可以按照1.2的步骤训练模型。

任任务帖子链接:https://xiaobenyang.com/discuss-post?id=131

点击"导入",将任务导入自己的项目查看。

5.2. 训练和部署

  • 使用"统计和查询"应用, 待统计表是行为表(电影评分表),计算每个电影的评分;附加特征表是物品表(电影信息表), 用于关联物品特征; 查询表是行为表(电影评分表),结果以查询表为左表,关联待统计表的统计值,和附加特征表的特征。


  • 填写参数

5.3. API调用

指定电影ID, 搜索所有评分记录,并计算平均评分

var axios = require('axios')
  
//设置小笨羊API访问URL
axios.defaults.baseURL = 'https://xiaobenyang.com/pred'
  
// 设置访问ApiKey, 在管理页面查询https://xiaobenyang.com/calc?func=LabPage&proc=ListMyApikey
axios.defaults.headers.common['APIKEY'] = '*'

axios.post(null, {
          'predServId': '42',
          'clause': '__alink_avg__ >= ' + this.minAvgRating + " and " + '__alink_count__>= ' + this.minCount
})

5.4. 请求结果

{
    "clause": "movie_id=2",
    "pred": "[{\"user_id\":5,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":875636053},{\"user_id\":268,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":875744173},{\"user_id\":276,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":874792436},{\"user_id\":217,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":889069782},{\"user_id\":87,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":879876074},{\"user_id\":250,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":878090414},{\"user_id\":201,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":884112487},{\"user_id\":64,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":889737609},{\"user_id\":13,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882397650},{\"user_id\":95,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":888955909},{\"user_id\":213,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":878955914},{\"user_id\":373,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":877100416},{\"user_id\":293,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":888907101},{\"user_id\":193,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":890860198},{\"user_id\":363,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":891495809},{\"user_id\":256,\"rating\":5.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye 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}



第三步,搭建电影网站

本示例使用Vue2, 调用第二步中部署的模型预测服务。