Ember self-regulation and polymorphism
there is a custom model that also treats it as a contact user has_many contacts
.
Than each contact has and belongs to many "groups". The user and the contact have the same address.
I've read through http://lukegalea.github.io/ember_data_polymorphic_presentation/#/ a couple of times, but still don't understand how to set up relationships { user | contact } <-> address
and contacts <-> groups
associations on the Ember side.
I now have (simplified view):
// Address
export default DS.Model.extend({
city: DS.attr('string'),
profile : DS.belongsTo('profile', { polymorphic: true, async: true })
});
// Profile
export default DS.Model.extend({
name: DS.attr('string'),
phone: DS.attr('string'),
address: DS.belongsTo('address', {async: true})
});
// Contact
export default Profile.extend({
groups: DS.hasMany('group')
});
// User
export default Profile.extend({
});
Here is the JSON
// GET /contacts
{
"contacts":[
{
"name":"Conrad",
"address_id":"1",
"id":1
},
{
"name":"Greyson",
"address_id":"2",
"id":2
},
{
"name":"Tommie",
"address_id":"3",
"id":3
}
]
}
// GET /addresses
{
"addresses":[
{
"city":"West Lillaton",
"profile_id":"0",
"profile_type":"Contact",
"id":1
},
{
"city":"Weissnatborough",
"profile_id":"1",
"profile_type":"Contact",
"id":2
},
{
"city":"Predovicton",
"profile_id":"2",
"profile_type":"Contact",
"id":3
},
{
"city":"VKHA",
"profile_id":1,
"profile_type":"User",
"id":4
}
]
}
// GET /users
{
"users":[
{
"name":"Emile",
"address_id":4,
"id":1
}
]
}
source to share
As far as I understand, there is no need for polymorphism here because you wrote: "Custom model, which also applies to ). You must establish a reflective attitude contacts
for the model user
.
If you want to define a reflexive relation, you must either explicitly define the other side and set an explicit inverse accordingly, or if you don't want the other side, set the inverse to null.
http://guides.emberjs.com/v1.12.0/models/defining-models/#toc_reflexive-relation
// User
export default DS.Model.extend({
name: DS.attr('string'),
phone: DS.attr('string'),
address: DS.belongsTo('address', {async: true, inverse: 'user'})
groups: DS.hasMany('group', {async: true}),
contacts: DS.hasMany('user', { inverse: null }),
});
// Address
export default DS.Model.extend({
city: DS.attr('string'),
user: DS.belongsTo('user', { async: true, inverse: 'address' })
});
// Group
export default DS.Model.extend({
name: DS.attr('string'),
users: DS.hasMany('user', {async: true}),
});
If you want user
and contact
be different ember models then
address
belongs to polymorphic profile
:
// Profile
export default DS.Model.extend({
name: DS.attr('string'),
phone: DS.attr('string'),
address: DS.belongsTo('address', {async: true, inverse: 'profile'})
});
// Contact
export default Profile.extend({
groups: DS.hasMany('group', {async: true}),
user: DS.belongsTo('user', { async: true, inverse: 'contacts' })
});
// User
export default Profile.extend({
contacts: DS.hasMany('contact', { inverse: 'user' }),
});
// Address
export default DS.Model.extend({
city: DS.attr('string'),
profile: DS.belongsTo('profile', { polymorphic: true, async: true, inverse: 'address' })
});
// Group
export default DS.Model.extend({
name: DS.attr('string'),
contacts: DS.hasMany('contact', {async: true}),
});
Note: correct paylod for GET addresses should be:
// GET /addresses
{"addresses":[
{
"id":1,
"city":"West Lillaton",
"profile": {"id:"1", "type":"Contact"},
},{
"id":2,
"city":"West Lillaton",
"profile": {"id:"2", "type":"User"},
}
]}
source to share