CODEWITHSUNDEEP
typescriptloopbackjsstrongloop
user1635697
user1635697

Reputation: 11

"statusCode": 422 should be number in loopback 4

I have json object from angular as {"weight": "50"} but LoopBack 4 needs {"weight": 50}. How can I achieve this? I do not want to make any change in angular. Is there any settings in LoopBack 4?

Please help.

Upvotes: 0

Views: 173

Answers (1)

Miroslav Bajtoš
Miroslav Bajtoš

Reputation: 10795

Hello from the LoopBack team 👋

LoopBack uses the popular library AJV to validate incoming requests. It is possible to configure AJV to coerce types during validation, e.g. convert string "50" to a number 50 for a numeric property, see Coercing data types.

To enable coercion, modify your main application file (src/application.ts) as follows:

Import RestBindings from @loopback/rest:

import {RestApplication, RestBindings} from '@loopback/rest';

Add the following line at the end of your application constructor:

this.bind(RestBindings.REQUEST_BODY_PARSER_OPTIONS).to({
  validation: {coerceTypes: true},
})

Please note this setup will enable coercion for all model properties and all value types. See AJV Coercion Rules to better understand what will happen to different value types.

Upvotes: 1

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