[英]Sequelize query shows additional data in Many to Many relationship
I have this setup, a many-to-many relationship between Users and Topics:我有这个设置,用户和主题之间的多对多关系:
User.belongsToMany(Topic, {through: "UserTopics", timestamps: false});
Topic.belongsToMany(User, {through: "UserTopics", timestamps: false});
I try to get all the users and their topics, this query does it pretty well:我尝试获取所有用户及其主题,这个查询做得很好:
User.findAll({
attributes: { exclude: ["password"] },
include: [
{ model: Topic, attributes: ['id', 'name',] }
]
})
This is what it outputs:这是它的输出:
[
{
"id": 1,
"firstName": "John",
"lastName": "Doe",
"CNP": "123",
"email": "john@gmail.com",
"validated": false,
"createdAt": "2021-02-15T21:46:52.000Z",
"updatedAt": "2021-02-15T21:46:52.000Z",
"topics": [
{
"id": 1,
"name": "crypto",
"UserTopics": {
"userId": 1,
"topicId": 1
}
},
...
},
...
]
But the problem that I have and I just can't figure why it happens is that UserTopics attribute that shows up for every topic a user has.但是我遇到的问题是我无法弄清楚为什么会发生这种情况是 UserTopics 属性会为用户拥有的每个主题显示。
How do I get rid of it?我该如何摆脱它?
Read this https://sequelize.org/master/manual/advanced-many-to-many.html阅读此https://sequelize.org/master/manual/advanced-many-to-many.html
If you want to exclude assosiation fields from result:如果要从结果中排除关联字段:
User.findAll({
attributes: { exclude: ["password"] },
include: [
{ model: Topic, attributes: ['id', 'name',] }
],
through: {
attributes: []
}
})
Thanks fatur for pointing out the page.感谢fatur指出页面。 The actual way to do this is a little bit different than what he wrote.
这样做的实际方法与他写的有点不同。 The "through" attribute must be inside the array object, like this:
“through”属性必须在数组 object 内,如下所示:
User.findAll({
attributes: { exclude: ["password"] },
include: [
{
model: Topic,
attributes: ["id", "name"],
through: {
attributes: []
}
}
]
})
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