EmbedsMany relation assigns default value to relation objects in response

[SowmyaGrama]

I have 2 model Task and Hearts, Task embedsMany hearts.
task.json

{
  "name": "Task",
  "base": "PersistedModel",
  "idInjection": true,
  "options": {
    "validateUpsert": true
  },
  "properties": {
    "taskId": {
      "type": "string"
    }
  },
  "validations": [],
  "relations": {
    "hearts": {
      "type": "embedsMany",
      "model": "hearts",
      "property": "heartsList",
      "options": {
        "validate": false,
        "forceId": false
      }
    }
    }},
  "acls": [],
  "methods": {}
}

hearts.json

{
  "name": "hearts",
  "base": "PersistedModel",
  "idInjection": true,
  "options": {
    "validateUpsert": true
  },
  "properties": {
    "hid": {
      "type": "string"
    }
  },
  "validations": [],
  "relations": {

  },
  "acls": [],
  "methods": {}
}

After model creation when i do a POST call.
Request:
POST http://localhost:3000/api/Tasks
Payload:
{
"taskId": "string"
}
Response:
{
"taskId": "string",
"id": 1,
"heartsList": []
}

Expected Result: Since I did not pass heartsList I do not expect it to be added in response, We have a situation where the heartsList property is readonly and should not be passed for POST Call.

Is there a way to omit it from getting added with default empty brackets?

[jannyHou]

@SowmyaGrama could you fork https://github.com/strongloop/loopback-sandbox and provide your code?

There is an example repo which contains a basic embedsMany relation from model Book to model People: https://github.com/strongloop/loopback-example-relations, I tried with it but by default when I do POST/ Books in explorer, it doesn't return me embedded items:

{
  "name": "janny",
  "id": 2,
  "links": []
  // embedded People is not included
}

And actually for GET/ Books you also have to use filter {"include": "embeddedRelationName"} to see your embedded items.
You can run node . for that example repo to test.

[SowmyaGrama]

Thanks Janny,

Let me try this and get back to u . I am using loopback version 2.X

On Fri, Nov 4, 2016 at 1:07 AM, Janny notifications@github.com wrote:

@SowmyaGrama https://github.com/SowmyaGrama could you fork
https://github.com/strongloop/loopback-sandbox and provide your code?

There is an example repo which contains a basic embedsMany relation from
model Book to model People: https://github.com/strongloop/
loopback-example-relations, I tried with it but by default when I do POST/
Books in explorer, it doesn't return me embedded items:

{
"name": "janny",
"id": 2,
"links": []
// embedded People is not included
}

And actually for GET/ Books you also have to use filter {"include":
"embeddedRelationName"} to see your embedded items.
You can run node . for that example repo to test.

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[SowmyaGrama]

@jannyHou : Just looked at the repo you shared, from you comments it clear that the people object is indeed returned from POST call to /Books
What is the payload you pass to /Books?
In the response i see

{
  "name": "janny",
  "id": 2,
  "links": [] --->  // embedded People is not included though i don't pass it in create payload
}

How can i avoid it?

[jannyHou]

@SowmyaGrama I am afraid you misunderstand here:
links is just a property of model Book, embedded people only occur in your book instance when you do GET Books/ with filter {"include": "people"}

sample result:

[
  {
    "name": "Book 1",
    "id": 1,
    "links": [
      {
        "id": 1,
        "name": "Author 1",
        "notes": "Note 1",
        "linkedId": 1,
        "linkedType": "Author"
      },
      {
        "id": 2,
        "name": "Reader 1",
        "notes": "Note 2",
        "linkedId": 1,
        "linkedType": "Reader"
      }
    ],
    "people": [
      {
        "id": 1,
        "name": "Author 1",
        "notes": "Note 1",
        "linkedId": 1,
        "linkedType": "Author",
        "linked": {
          "name": "Author 1",
          "id": 1
        }
      },
      {
        "id": 2,
        "name": "Reader 1",
        "notes": "Note 2",
        "linkedId": 1,
        "linkedType": "Reader",
        "linked": {
          "name": "Reader 1",
          "id": 1
        }
      }
    ]
  }
]

[SowmyaGrama]

Janny, I was thinking that since links is a embedsMany field, the people model is returned within the links field. In the model defined here books has 3 fields, id, name and people
https://github.com/strongloop/loopback-example-relations/blob/master/common/models/book.json

Now if do not want links to be returned as empty array, is there a way to avoid it?
I will do a POST call with { "name":"test"} this should return me { "name":"test","id":3}

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