[Go-Server] Add support for DateTime Query Parameters

[icubbon]

Add support to the Go-Server template to parse DateTime parameters in the Query and as a List in the Query.

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@lwj5 @wing328

[lwj5]

Hi @icubbon

Thank you for the PR. As there are currently no cases with DateTime in the generation sample, it is difficult to see how the generated files will look.

Would you be able to add a new route or add a datetime field somewhere in https://github.com/OpenAPITools/openapi-generator/blob/master/modules/openapi-generator/src/test/resources/3_0/go-server/petstore.yaml

then regenerate the code for go-server.

Let us know if you need any help with generation

[icubbon]

Hi @icubbon

Thank you for the PR. As there are currently no cases with DateTime in the generation sample, it is difficult to see how the generated files will look.

Would you be able to add a new route or add a datetime field somewhere in https://github.com/OpenAPITools/openapi-generator/blob/master/modules/openapi-generator/src/test/resources/3_0/go-server/petstore.yaml

then regenerate the code for go-server.

Let us know if you need any help with generation

Good call with the example! An import for time was missing in the api-controller.mustache template but was being added in my personal work setup with a call to goimports.
I had to re-arrange where the parsing was done as the api-controllers.mustache template didn't have good support for dynamic importing.

[lwj5]

LGTM, just need to update the following

[lwj5]

Suggested change

	splits := strings.Split(param, ", ")
	splits := strings.Split(param, ",")

Dont require a space

[lwj5]

Will need your help to resolve the conflict before we can merge

[icubbon]

Conflicts resolved, looks like the generated examples have both the Enum changes and the DateTime changes as well.

[lwj5]

Lgtm, @wing328 good to merge