Every example code of one to many in sails/waterline documentation assumes the primary key is the association between two models (I think).
帆/水线文档中的一对多的示例代码假定主键是两个模型之间的关联(我认为)。
http://sailsjs.org/documentation/concepts/models-and-orm/associations/one-to-many
However i have models that have a referral column that references some other values similar to
但是,我的模型有一个引用列,引用其他类似的值
User
{
id (primary): <int>
email: <string>
}
recordings
{
id (primary): <int>
email: <that email from user>
}
atm im trying
atm我正在尝试
userModel.js
{
attributes: {
email: {
type: 'string',
size: 255,
unique: true
},
},
queries: {
columnName: 'email',
model: 'recordings'
}
.....
}
}
recordingsModel.js
{
attributes: {
email: {
type: 'string',
size: 255,
},
},
queries: {
model: 'user'
}
.....
}
}
and in the Controller
在控制器中
sails.models.user
.find()
.populate('queries')
.exec(function (err, results) {
});
But i get the error : ER_BAD_FIELD_ERROR: Unknown column '__queries.queries' in 'field list'
但我得到错误:ER_BAD_FIELD_ERROR:'字段列表'中的未知列'__queries.queries'
Does anyone have a good tutorial for one to many relationships in waterline because the documentation on there site is pretty bad so i feel im just not understanding how to design the models.
有没有人有一个关于水线中一对多关系的好教程,因为那里的文档非常糟糕所以我觉得我只是不了解如何设计模型。
1 个解决方案
#1
1
From what I can gather, what you want is to be able to set up your userModel and recordingsModel models such that, by giving a recording a certain value for email, it will automatically be associated with any users that share that email. This is not something that the Waterline (the Sails ORM) supports.
从我可以收集的内容来看,您想要的是能够设置您的userModel和recordingsModel模型,这样,通过为电子邮件提供特定值的记录,它将自动与共享该电子邮件的任何用户相关联。这不是Waterline(Sails ORM)支持的东西。
Instead, your best option is to set the models up as indicated in the documentation:
相反,您最好的选择是按照文档中的说明设置模型:
// userModel.js
{
attributes: {
email: {
type: 'string',
size: 255,
unique: true
},
},
recordings: {
collection: 'recordingsModel',
via: 'user'
}
.....
}
}
// recordingsModel.js
{
attributes: {
email: {
type: 'string',
size: 255,
},
},
user: {
model: 'userModel'
}
}
}
My guess is that you're trying to avoid having to look up a user ID in order to associate a new recording with it. You can do this if you make email the primary key of the userModel; then when you create a new recording, you can set its user to an email address and voila: the two are linked.
我的猜测是你试图避免查找用户ID以便将新录音与它相关联。如果您将电子邮件作为userModel的主键,则可以执行此操作;然后,当您创建新录制内容时,可以将其用户设置为电子邮件地址,然后将两者关联起来。
#1
1
From what I can gather, what you want is to be able to set up your userModel and recordingsModel models such that, by giving a recording a certain value for email, it will automatically be associated with any users that share that email. This is not something that the Waterline (the Sails ORM) supports.
从我可以收集的内容来看,您想要的是能够设置您的userModel和recordingsModel模型,这样,通过为电子邮件提供特定值的记录,它将自动与共享该电子邮件的任何用户相关联。这不是Waterline(Sails ORM)支持的东西。
Instead, your best option is to set the models up as indicated in the documentation:
相反,您最好的选择是按照文档中的说明设置模型:
// userModel.js
{
attributes: {
email: {
type: 'string',
size: 255,
unique: true
},
},
recordings: {
collection: 'recordingsModel',
via: 'user'
}
.....
}
}
// recordingsModel.js
{
attributes: {
email: {
type: 'string',
size: 255,
},
},
user: {
model: 'userModel'
}
}
}
My guess is that you're trying to avoid having to look up a user ID in order to associate a new recording with it. You can do this if you make email the primary key of the userModel; then when you create a new recording, you can set its user to an email address and voila: the two are linked.
我的猜测是你试图避免查找用户ID以便将新录音与它相关联。如果您将电子邮件作为userModel的主键,则可以执行此操作;然后,当您创建新录制内容时,可以将其用户设置为电子邮件地址,然后将两者关联起来。