[perl] Referenced Swagger datatype modules are not loaded

[lbordowitz]

Description

When I have nested objects in a perl client, it doesn't work correctly. I get an error on deserialization:

Can't call method "from_hash" on an undefined value at /lib/WWW/SwaggerClient/Object/Thingy.pm line 133

This happens whenever the type is "number" or when I use a referenced object type. This issue is about the latter case.

Swagger-codegen version

2.2.3

Swagger declaration file content or url

This happens in the PetStore example, and I use that in this test case.

Steps to reproduce

Save this file as test.pl in the samples directory.

Run perl test.pl with all the necessary modules installed. You will get the following error message:

Can't call method "from_hash" on an undefined value at lib/WWW/SwaggerClient/Object/Pet.pm

The reason this problem doesn't come up in the normal test is because all the necessary objects are included as part of the test. This means, in order to use a perl client generated by swagger, you would need to require the end-user to include both the object and all the object's property dependencies transitively. That hardly seem reasonable.

Suggest a fix/enhancement

In the "use" block there should be a bundle of lines that refers to all the datatypes, like use {{moduleName}}::Object::{{datatype}} for each datatype. That way, when the eval is called the $_instance variable won't be undefined. Please make sure to handle ARRAY properties correctly, as well.

[wing328]

@lbordowitz thanks for reporting the issue. Please file a PR with the suggested fix so that we can review the fix more easily.

[lbordowitz]

@wing328 Okay, added change in pull request #6500 .