bookshelf.js关系有很多错误
在使用书架的hasMany
调用中出现以下错误:
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); }); })
我将我的模型作为string引用,并使用Bookshelf的registry插件 。
var bookshelf = new Bookshelf( knex ); bookshelf.plugin( 'registry' );
然后我定义并创build一个模型:
var userModel = /*do bookshelf things*/; bookshelf.model( 'User', userModel );
然后当我创build一个.hasMany
,我使用一个string来引用。
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);