How to get a master detail query by loopback?

Question

I have Company and Product model with has many relation from company to product model. how to make a Get method to get company name or ID returns company information with all related products.

something like fallowing object:

 [{
        "C_name": "tatli",
        "address": "TR-IS- aktepe",
        "tel": "123456789",
        "id": "5a18772e61b6370e4c713b44",
      [{
    "P_Code": "123456",
    "P_name": "screw",
    "QTY": 30,
    "id": "5a1878af61b6370e4c713b46",
    "compny_id": "5a18772e61b6370e4c713b44"
  },
  {
    "P_Code": "123457",
    "P_name": "Bead",
    "QTY": 33,
    "id": "5a1878af61b6370e4c713b47",
    "compny_id": "5a18772e61b6370e4c713b44"
  }]
    }]

Answer 1

Hope you have provided the Relation properly in the model of Company . If not just look at the following link and Create the relation . In this case the relation will be a belongs to .

Product Belongs to a Company

In order to query the related results you have two ways .

• Including it the default model of Company . So that loopback's default get will return you all the rows. Like

company.json model file

  "relations": { // make sure the name of product model and foreign key is correct
    "product": {
      "type": "belongsTo",
      "model": "product",
      "foreignKey": "productId"
    }
  },

 "scope": {
    "include": "product"
  },

• Second way is to write it in a remote method.

 Company.getPrefs = function(id, cb) { Company.find({ where: { }, include: [{relation: 'Product'}] };