[英]bookshelf.js relationship hasMany error
我在使用Bookshelf的hasMany
調用時收到以下錯誤:
A valid target model must be defined for the roles hasMany relation
Role.js
var Data = require('../server-includes/Data'),
User = require('./User');
var Role = Data.bookshelf.Model.extend({
tableName: 'roles',
users: function() {
return this.hasMany(User, 'role_id');
}
});
module.exports = Role;
user.js的
var Data = require('../server-includes/Data'),
Role = require('./Role');
var User = Data.bookshelf.Model.extend({
tableName: 'users',
role: function() {
return this.belongsTo(Role, 'id');
},
};
module.exports = User;
用法:
new Role({ id: req.params.id })
.fetch({ require: true, withRelated:['users'] })
.then(function (role) {
role.users().fetch().then(function(users) {
console.log('users: ' + users);
});
})
我將我的模型作為字符串引用,並使用Bookshelf的注冊表插件 。
var bookshelf = new Bookshelf( knex );
bookshelf.plugin( 'registry' );
然后我定義並創建一個模型:
var userModel = /*do bookshelf things*/;
bookshelf.model( 'User', userModel );
然后當我創建一個.hasMany
,我使用一個字符串來引用。
users: function() {
return this.hasMany( 'User', 'roleId' );
},
post.js
Bookshelf.plugin('registry')
var Category = require('./category')
var Post = Bookshelf.Model.extend({
tableName: 'posts',
hasTimestamps: true,
categories: function () {
return this.belongsTo('Category', 'category_id');
},
});
module.exports = Bookshelf.model('Post',Post);
category.js
Bookshelf.plugin('registry');
var Post = require('./post');
var Category = Bookshelf.Model.extend({
tableName: 'categories',
hasTimestamps: true,
posts : function () {
return this.hasMany('Post');
}
});
module.exports = Bookshelf.model('Category', Category);
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