Composite Models (models Within Models), Or Manual Foreign Key Associations Between Models?

I have two models, and I want to 'nest' one within the other. Is there a way to do this with Sencha Touch? My models look like this: Ext.regModel('OuterModel', { fields: ['name

Solution 1:

Models can have associations with other Models via belongsTo and hasMany associations. For example, let's say we're writing a blog administration application which deals with Users, Posts and Comments. We can express the relationships between these models like this:

  Ext.regModel('Post', {
    fields: ['id', 'user_id'],

    belongsTo: 'User',
    hasMany  : {model: 'Comment', name: 'comments'}
 });

Ext.regModel('Comment', {
    fields: ['id', 'user_id', 'post_id'],

    belongsTo: 'Post'
 });

Ext.regModel('User', {
    fields: ['id'],

    hasMany: [
        'Post',
        {model: 'Comment', name: 'comments'}
    ]
 });

See the docs for Ext.data.BelongsToAssociation and Ext.data.HasManyAssociation for details on the usage and configuration of associations. Note that associations can also be specified like this:

Ext.regModel('User', {
    fields: ['id'],

    associations: [
        {type: 'hasMany', model: 'Post',    name: 'posts'},
        {type: 'hasMany', model: 'Comment', name: 'comments'}
    ]
});