Issue #2564 : Query structs now export their fields

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/GoClientCodegen.java

@@ -4,6 +4,7 @@ import io.swagger.codegen.*;
 import io.swagger.models.properties.ArrayProperty;
 import io.swagger.models.properties.MapProperty;
 import io.swagger.models.properties.Property;
+import io.swagger.models.parameters.Parameter;
 
 import java.io.File;
 import java.util.*;
@@ -223,6 +224,36 @@ public class GoClientCodegen extends DefaultCodegen implements CodegenConfig {
         return toModelName(name);
     }
 
+
+
+    /**
+     * Overrides postProcessParameter to add a vendor extension "x-exportParamName".
+     * This is useful when paramName starts with a lowercase letter, but we need that
+     * param to be exportable (starts with an Uppercase letter).
+     *
+     * @param parameter CodegenParameter object to be processed.
+     */
+    @Override
+    public void postProcessParameter(CodegenParameter parameter){
+
+        // Give the base class a chance to process
+        super.postProcessParameter(parameter);
+
+        char firstChar = parameter.paramName.charAt(0);
+
+        if (Character.isUpperCase(firstChar)) {
+            // First char is already uppercase, just use paramName.
+            parameter.vendorExtensions.put("x-exportParamName", parameter.paramName);
+
+        }
+
+        // It's a lowercase first char, let's convert it to uppercase
+        StringBuilder sb = new StringBuilder(parameter.paramName);
+        sb.setCharAt(0, Character.toUpperCase(firstChar));
+        parameter.vendorExtensions.put("x-exportParamName", sb.toString());
+    }
+
+
     @Override
     public String getTypeDeclaration(Property p) {
         if(p instanceof ArrayProperty) {

modules/swagger-codegen/src/main/resources/go/api.mustache

@@ -81,10 +81,10 @@ func (a {{classname}}) {{nickname}} ({{#allParams}}{{paramName}} {{{dataType}}}{
     }
     
 {{#hasQueryParams}}    type QueryParams struct {
-        {{#queryParams}}{{paramName}}    {{dataType}} `url:"{{baseName}},omitempty"`
+        {{#queryParams}}{{vendorExtensions.x-exportParamName}}    {{dataType}} `url:"{{baseName}},omitempty"`
         {{/queryParams}}
 }
-    _sling = _sling.QueryStruct(&QueryParams{ {{#queryParams}}{{paramName}}: {{paramName}}{{#hasMore}},{{/hasMore}}{{/queryParams}} })
+    _sling = _sling.QueryStruct(&QueryParams{ {{#queryParams}}{{vendorExtensions.x-exportParamName}}: {{paramName}}{{#hasMore}},{{/hasMore}}{{/queryParams}} })
 {{/hasQueryParams}}
     // accept header
     accepts := []string { {{#produces}}"{{mediaType}}"{{#hasMore}}, {{/hasMore}}{{/produces}} }
@@ -96,10 +96,10 @@ func (a {{classname}}) {{nickname}} ({{#allParams}}{{paramName}} {{{dataType}}}{
     _sling = _sling.Set("{{baseName}}", {{paramName}})
 {{/headerParams}}{{/hasHeaderParams}}
 {{#hasFormParams}}    type FormParams struct {
-{{#formParams}}        {{paramName}}    {{dataType}} `url:"{{baseName}},omitempty"`
+{{#formParams}}        {{vendorExtensions.x-exportParamName}}    {{dataType}} `url:"{{baseName}},omitempty"`
 {{/formParams}}
     }
-    _sling = _sling.BodyForm(&FormParams{ {{#formParams}}{{paramName}}: {{paramName}}{{#hasMore}},{{/hasMore}}{{/formParams}} })
+    _sling = _sling.BodyForm(&FormParams{ {{#formParams}}{{vendorExtensions.x-exportParamName}}: {{paramName}}{{#hasMore}},{{/hasMore}}{{/formParams}} })
 {{/hasFormParams}}
 {{#hasBodyParam}}{{#bodyParams}}// body params
     _sling = _sling.BodyJSON({{paramName}})