Custom struct fieldname

[octomad]

This is a feature request to support custom struct field names.

We have a situation where we are using allOf to reference a JSON schema that has a property with a similar name. After the name gets sanitized for Go, it ends up duplicating a field name that already exists.

Example:

parentschema.json

{
  "title": "node",
  "type": "object",
  "description": "Represents a node",
  "properties": {
    "@id": {
      "type": "string",
      "readOnly": true
    }
}

components in the OpenAPI Spec

components:
  schemas:
    resourcenode:
      title: resourcenode
      allOf:
        - $ref: ./parentschema.json
        - type: object
          properties:
            id:
              type: string
              format: uuid
              description: ID of the resource
              readOnly: true

Because there's a property in the parentschema.json called @id, and a property in the OpenAPI schema called id, the generated code will output

type Resourcenode struct {
	Id string `json:"@id"`
	Id string `json:"id"`
}

Which obviously won't compile because of the duplicate field in the struct. If we could add support for custom field names, that would help.

An alternative approach would be to add an X-Extension for x-go-fieldname-prefix to prefix the property so that it generates this instead

type Resourcenode struct {
	NodeId string `json:"@id"`
	Id string `json:"id"`
}

[octomad]

I don't mind implementing the change if you give me some pointers.

[emilekm]

Hey @octomad, I've implemented the change you requested - please take a look and tell me if it satisfies you and if it works for your case.

[octomad]

SHIP IT!