How to organize select for JSON?

Question

JSON

Hello!
There is data in JSON format as a file.
Example: there are many vehicle objects (V), each of which has its own manufacturer, color, etc. For each vehicle object, you can select the type: motorcycle or car. Each type of vehicle has its own properties that hypothetically do not change, for example, the maximum speed. So in JS I would write something like this:

var type_1 = {
    max_speed: 300
  },
  type_2 = {
    max_speed: 260
  },
  transport_1 = {
    color: "red",
    type: type_2
  },
  transport_2 = {
    color: "blue",
    type: type_1
  }
}

In general, something like this. So then I could find out the maximum speed of the transport_2 object: transport_2.type.max_speed, but I can’t do this in the json file, links to objects are wrong, just stupid text. Now I open the json file through php and output the layout through the template engine, I just need to do a select for these vehicles objects so that I can select the type of this vehicle, so I don’t understand how I can organize this whole thing so that the object TS knew what type he was. Anyone with experience please share. Thank you.

Answer 1

Do not make circular references

var data = {
  types: {
    type_1: {
      max_speed: 300
    },
    type_2: {
      max_speed: 260
    }
  },
  TC: {
    transport_1: {
      color: "red",
      type: "type_2"
    },
    transport_2: {
      color: "blue",
      type: "type_1"
    }
  }
}

var tc = data.TC.transport_1;
console.log("Car:", tc.color); //red
console.log("Speed:", data.types[tc.type].max_speed); //260

Then there will be no problems in JSON

{
  "types": {
    "type_1": {
      "max_speed": 300
    },
    "type_2": {
      "max_speed": 260
    }
  },
  "TC": {
    "transport_1": {
      "color": "red",
      "type": "type_2"
    },
    "transport_2": {
      "color": "blue",
      "type": "type_1"
    }
  }
}

As well as in PHP when working with JSON

PHP: json_decode()