sails js many to many record insertion error - node.js

Question

I have two models: Users and InstalledApps. Models are like this:
//Users Model
attributes:{
name: 'string',
age: 'string',
installedApps:{
collection: 'installedApps',
via: 'users'
}
}
My InstalledApps model is like this:
attributes:{
deviceID : 'string',
users:{
collection:'users',
via:'installedApps'
}
}
Now I have already created the user with id 1 and 2.
But when I insert data in InstalledApps via postman like this:
{
"users": [1,2],
"deviceID": "123456",
}
It pops an error: Unknown rule: default. I don't know where I am wrong?

Answer 1

Your models are fine. Have you made sure you're posting the data as JSON? In the Body tab in Postman, select raw and then change from Text to JSON (application/json). Remove the surplus comma after "123456" and your request should go through without problems. Also, make sure you're doing a POST request to the /installedApps route, e.g. http://localhost:1337/installedApps.
I tested this with the model definitions you posted in a fresh Sails.js app, getting installedApps entries inserted correctly with associations to users entries.

Answer 2

I think you made your models wrong.
You should use http://sailsjs.com/documentation/concepts/models-and-orm/associations/through-associations .
Then you should have 3 models. USER, APP, INSTALLED_APPS.
Your user model will get:
//Users Model
attributes:{
name: 'string',
age: 'string',
installedApps:{
collection: 'APP',
via: 'user',
through: 'installedApps'
}
}
and your APP model:
//APP Model
attributes:{
device: 'string',
installedApps:{
collection: 'APP',
via: 'app',
through: 'installedApps'
}
}
and finally your INSTALLED_APPS:
//INSTALLED_APPS Model
attributes:{
user: {
model: 'user'
},
app: {
model: 'app'
}
}
Then you will just use simple create of INSTALLED APP for every user/app or blueprint http://sailsjs.com/documentation/reference/blueprint-api/add-to
Hope it helps.