[Typescript-Axios] Api outputs incorrect serialization type check

[JMontagu]

Description

The typescript-axios generator outputs an incorrect type check for serialization.

Current output:

const needsSerialization = (<any>"Pet" !== "string") || localVarRequestOptions.headers['Content-Type'] === 'application/json';

Expected output:

const needsSerialization = (typeof body !== "string") || localVarRequestOptions.headers['Content-Type'] === 'application/json';

The issue is <any>"Pet" !== "string" will always evaluate to true, as it's comparing a string value to a string value.

What the correct logic should be is: typeof body !== "string", which checks the body object is not a string in order to run serialization.

openapi-generator version

4.1.2

OpenAPI declaration file content or url

Command line used for generation

Steps to reproduce

Generate any api output using the typescript-axios generator.

Related issues/PRs

N/A

Suggest a fix/enhancement

In src/main/resources/typescript-axios/apiInner.mustache, replace

const needsSerialization = (<any>"{{dataType}}" !== "string") || localVarRequestOptions.headers['Content-Type'] === 'application/json';

With:

const needsSerialization = (typeof {{paramName}} !== "string") || localVarRequestOptions.headers['Content-Type'] === 'application/json';

This also matches the current flow generator template.