Deep populate

Populate data from the multiple collection, databases or instances we use deep in the request payload.
We can provide deep information at two places:
- In collection schema
- In payload, itself, check more

simple deep

Here,

s_key = Source table field name
t_col = Target table name
t_key = Target table field name
t_instance = The instance name in which target table is present.
t_db = The database name in which the target table is present.

{
    "find": {
        "owner_id": 1
    },
    "deep": [
        {
            "s_key": "owner_id",
            "t_instance": "mysql",
            "t_db": "inventory",
            "t_col": "customers",
            "t_key": "customer_id"
        }
    ]
}

Add deep information in schema

Set instance, database, collection, and column in schema of the collection and provide only 's_key'(source key) in the deep to get deep data.

Request Payload

{
    "deep": [
        {
            "s_key": "owner_id"
        }
    ]
}

Set deep for multiple fields

You can set deep inheritance using dot.

Request Payload

{
    "deep": [
        {
            "s_key": "owner_id"
        },
        {
            "s_key": "owner_id.shipping_id"
        }
    ]
}

Deep inheritance

Write 'deep' in to the 'deep' and you will get inherited data.

Request Payload

{
    "deep": [
        {
            "s_key": "price",
            "t_col": "orders",
            "t_key": "total",
            "select": "pincode",
            "deep": [
                {
                    "s_key": "shipping_id",
                    "t_col": "customers",
                    "t_key": "shipping_id",
                    "select": "phone"
                },
                {
                    "s_key": "shipping_id.pincode",
                    "t_col": "orders",
                    "t_key": "pincode"
                }
            ]
        }
    ]
}

Circular dependency

API Maker automatically handle the circular dependency so you do not need to take care of it.

Request Payload

{
    "deep": [
        {
            "s_key": "owner_id",
            "t_col": "customers",
            "t_key": "customer_id",
            "deep": [
                {
                    "s_key": "customer_id",
                    "t_col": "products",
                    "t_key": "owner_id",
                    "select": "owner_id",
                    "deep": [
                        {
                            "s_key": "owner_id",
                            "t_col": "customers",
                            "t_key": "customer_id",
                            "select": "customer_id"
                        }
                    ]
                }
            ]
        }
    ]
}