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[英]Sequelize.js,How to insert a model with one to many to many relationship
[英]Sequelize.js insert a model with one-to-many relationship
我有两个具有一对多关系的续集模型。 让我们称它们为所有者和财产。
假设它们是使用sails-hook-sequelize 定义的(简化)。
//Owner.js
module.exports = {
options: {
tableName: 'owner'
},
attributes: {
id: {
type: Sequelize.BIGINT,
allowNull: false,
primaryKey: true,
autoIncrement: true
},
name: {
type: Sequelize.STRING(255)
},
associations: function () {
Owner.hasMany(Property, {
foreignKey: {
name: 'owner_id'
}
});
}
}
//Property.js
module.exports = {
options: {
tableName: 'property'
},
attributes: {
id: {
type: Sequelize.BIGINT,
allowNull: false,
primaryKey: true,
autoIncrement: true
},
name: {
type: Sequelize.STRING(255)
}
}
现在假设我想在我的数据库中插入一个所有者记录并插入一些与所有者关联的属性记录。 我该怎么做?
我正在寻找类似的东西
Owner.create({name:'nice owner',
property: [{name:'nice property'},
{name:'ugly property'}]});
令人惊讶的是,我在 Sequelize 文档中找不到这个。
创建所有者时,您不能将财产现有记录关联起来,您必须在之后立即使用承诺链进行关联。
Owner.create({name:'nice owner'}).then(function(owner){
owner.setProperties([{name:'nice property'}, {name:'ugly property'}]).then(/*...*/);
});
为了避免这些关联出现任何问题(所有者创建但某些关联失败),最好使用事务。
sequelize.transaction(function(t) {
return Owner.create({name:'nice owner'}, {transaction: t}).then(function(owner){
return owner.setProperties([{name:'nice property'}, {name:'ugly property'}], {transaction : t});
});
});
但是,如果您想创建与新属性关联的新所有者,您可以执行以下操作
Owner.create({
name: 'nice owner',
property: [
{ name: 'nice property'},
{ name: 'ugly property'}
]
},{
include: [ Property]
});
请参阅http://docs.sequelizejs.com/en/latest/docs/associations/#creating-with-associations
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