骨干关系事件未触发?
class TheModel extends Backbone.RelationalModel
relations:[
type: Backbone.HasMany
key: 'subModels'
relatedModel: SubModel
collectionType: SubModels
reverseRelation:
key: 'TheModel'
]
themodel = new the TheModel({subModels:[{#stuff},{#stuff},{#stuff}]})
我有 createModels 所以 themodel.get('subModels') 返回模型的集合.
I have createModels on so themodel.get('subModels') returns a collection of models.
现在，如果我将更改的子模型数据传递到 mymodel
Now if I pass changed subModel data into mymodel
themodel.set({subModels:[{changedstuff},{stuff},{stuff}]})
themodel 不应该抛出 change 事件吗?它不适合我.
Shouldn't themodel throw a change event? It doesn't for me.
如果我将相同的数据传递给 mymodel
More so if I pass identical data into mymodel
themodel.set({subModels:[{samestuff},{samestuff},{samestuff}]})
themodel.attributes.subModels 会引发 add 和 update 事件，即使没有什么是新的.
themodel.attributes.subModels throws add and update events, even though nothing is new.
我不确定为什么会出现这些问题，任何帮助都会很棒，谢谢！！！！
I'm not sure why these issues are happening, any help would be great, thanks!!!!
推荐答案
如果你通过设置一个新集合来重置整个关系，Backbone-relational 将(目前)只是替换整个集合，而不是检查差异.所以它会为所有当前的 subModels 触发 remove 事件，然后为每个新的 add 事件触发.
If you reset a whole relation like that by setting a new collection, Backbone-relational will (at the moment) just replace the whole collection, instead of checking for differences. So it'll fire a remove event for all current subModels, then fire add events for each new one.
我确实收到了 change 事件，使用以下代码(如果发布的代码包含完整的示例，这将有所帮助；)
I do get change events though, with the following code (it would help if posted code contains a complete example though ;)
var SubModel = Backbone.RelationalModel.extend({});
var TheModel = Backbone.RelationalModel.extend({
relations: [{
type: Backbone.HasMany,
key: 'subModels',
relatedModel: SubModel,
reverseRelation: {
key: 'TheModel'
}
}]
});
themodel = new TheModel({subModels: [{ id: 5 },{id: 7},{id: 8}]})
themodel.bind( 'change', function() {
console.debug( 'change; args=%o', arguments );
});
themodel.bind( 'change:subModels', function() {
console.debug( 'change:subModels; args=%o', arguments );
});
themodel.bind( 'update:subModels', function() {
console.debug( 'update:subModels; args=%o', arguments );
});
themodel.bind( 'add:subModels', function() {
console.debug( 'add:subModels; args=%o', arguments );
});
themodel.bind( 'remove:subModels', function() {
console.debug( 'remove:subModels; args=%o', arguments );
});
console.debug( 'set new subModels' );
themodel.set( {subModels: [{ id: 5 },{id: 7},{id: 9}] } )
这会产生以下输出:
set new subModels
change:subModels; args=[Object { _queue={...}, attributes={...}, _escapedAttributes={...}, more...}, [Object { id=5}, Object { id=7}, Object { id=9}], Object {}]
change; args=[Object { _queue={...}, attributes={...}, _escapedAttributes={...}, more...}, undefined]
remove:subModels; args=[Object { _queue={...}, attributes={...}, _escapedAttributes={...}, more...}, Object { length=3, models=[3], _byId={...}, more...}, Object { _related={...}}]
remove:subModels; args=[Object { _queue={...}, attributes={...}, _escapedAttributes={...}, more...}, Object { length=3, models=[3], _byId={...}, more...}, Object { _related={...}}]
remove:subModels; args=[Object { _queue={...}, attributes={...}, _escapedAttributes={...}, more...}, Object { length=3, models=[3], _byId={...}, more...}, Object { _related={...}}]
add:subModels; args=[Object { _queue={...}, attributes={...}, _escapedAttributes={...}, more...}, Object { length=3, models=[3], _byId={...}, more...}, Object {}]
add:subModels; args=[Object { _queue={...}, attributes={...}, _escapedAttributes={...}, more...}, Object { length=3, models=[3], _byId={...}, more...}, Object {}]
add:subModels; args=[Object { _queue={...}, attributes={...}, _escapedAttributes={...}, more...}, Object { length=3, models=[3], _byId={...}, more...}, Object {}]
update:subModels; args=[Object { _queue={...}, attributes={...}, _escapedAttributes={...}, more...}, Object { length=3, models=[3], _byId={...}, more...}, Object {}]
如果您没有看到这些更改事件，您能否检查一下您正在使用哪些版本的主干和主干关系?
If you don't see these change events, could you check which versions of backbone and backbone-relational you're using?
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