added support for multi

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

@@ -75,9 +75,22 @@ func (a {{classname}}) {{nickname}}({{#allParams}}{{paramName}} {{{dataType}}}{{
 	// add default headers if any
 	for key := range a.Configuration.DefaultHeader {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
-	}{{#hasQueryParams}}{{#queryParams}}
+	}
-
+	{{#hasQueryParams}}
+	{{#queryParams}}
+	{{#isListContainer}}
+	var collectionFormat = "{{#collectionFormat}}{{collectionFormat}}{{/collectionFormat}}"
+	if collectionFormat == "multi" {
+		for _, value := range {{paramName}} {
+			queryParams["{{paramName}}"] = value
+		}
+	} else {
 		queryParams["{{paramName}}"] = a.Configuration.APIClient.ParameterToString({{paramName}})
+	}
+	{{/isListContainer}}
+	{{^isListContainer}}
+		queryParams["{{paramName}}"] = a.Configuration.APIClient.ParameterToString({{paramName}})
+	{{/isListContainer}}
 	{{/queryParams}}{{/hasQueryParams}}
 
 	// to determine the Content-Type header

samples/client/petstore/go/go-petstore/pet_api.go

@@ -64,6 +64,7 @@ func (a PetApi) AddPet(body Pet) (*APIResponse, error) {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{ "application/json", "application/xml",  }
 
@@ -132,6 +133,7 @@ func (a PetApi) DeletePet(petId int64, apiKey string) (*APIResponse, error) {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{  }
 
@@ -198,8 +200,14 @@ func (a PetApi) FindPetsByStatus(status []string) ([]Pet, *APIResponse, error) {
 	for key := range a.Configuration.DefaultHeader {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
-
+	var collectionFormat = "csv"
+	if collectionFormat == "multi" {
+		for _, value := range status {
+			queryParams["status"] = value
+		}
+	} else {
 		queryParams["status"] = a.Configuration.APIClient.ParameterToString(status)
+	}
 	
 
 	// to determine the Content-Type header
@@ -264,8 +272,14 @@ func (a PetApi) FindPetsByTags(tags []string) ([]Pet, *APIResponse, error) {
 	for key := range a.Configuration.DefaultHeader {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
-
+	var collectionFormat = "csv"
+	if collectionFormat == "multi" {
+		for _, value := range tags {
+			queryParams["tags"] = value
+		}
+	} else {
 		queryParams["tags"] = a.Configuration.APIClient.ParameterToString(tags)
+	}
 	
 
 	// to determine the Content-Type header
@@ -331,6 +345,7 @@ func (a PetApi) GetPetById(petId int64) (*Pet, *APIResponse, error) {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{  }
 
@@ -394,6 +409,7 @@ func (a PetApi) UpdatePet(body Pet) (*APIResponse, error) {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{ "application/json", "application/xml",  }
 
@@ -463,6 +479,7 @@ func (a PetApi) UpdatePetWithForm(petId int64, name string, status string) (*API
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{ "application/x-www-form-urlencoded",  }
 
@@ -532,6 +549,7 @@ func (a PetApi) UploadFile(petId int64, additionalMetadata string, file *os.File
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{ "multipart/form-data",  }
 

samples/client/petstore/go/go-petstore/store_api.go

@@ -58,6 +58,7 @@ func (a StoreApi) DeleteOrder(orderId string) (*APIResponse, error) {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{  }
 
@@ -115,6 +116,7 @@ func (a StoreApi) GetInventory() (*map[string]int32, *APIResponse, error) {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{  }
 
@@ -173,6 +175,7 @@ func (a StoreApi) GetOrderById(orderId int64) (*Order, *APIResponse, error) {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{  }
 
@@ -231,6 +234,7 @@ func (a StoreApi) PlaceOrder(body Order) (*Order, *APIResponse, error) {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{  }
 

samples/client/petstore/go/go-petstore/user_api.go

@@ -57,6 +57,7 @@ func (a UserApi) CreateUser(body User) (*APIResponse, error) {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{  }
 
@@ -118,6 +119,7 @@ func (a UserApi) CreateUsersWithArrayInput(body []User) (*APIResponse, error) {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{  }
 
@@ -179,6 +181,7 @@ func (a UserApi) CreateUsersWithListInput(body []User) (*APIResponse, error) {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{  }
 
@@ -241,6 +244,7 @@ func (a UserApi) DeleteUser(username string) (*APIResponse, error) {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{  }
 
@@ -300,6 +304,7 @@ func (a UserApi) GetUserByName(username string) (*User, *APIResponse, error) {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{  }
 
@@ -362,10 +367,7 @@ func (a UserApi) LoginUser(username string, password string) (*string, *APIRespo
 	for key := range a.Configuration.DefaultHeader {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
-
 		queryParams["username"] = a.Configuration.APIClient.ParameterToString(username)
-	
-
 			queryParams["password"] = a.Configuration.APIClient.ParameterToString(password)
 	
 
@@ -422,6 +424,7 @@ func (a UserApi) LogoutUser() (*APIResponse, error) {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{  }
 
@@ -486,6 +489,7 @@ func (a UserApi) UpdateUser(username string, body User) (*APIResponse, error) {
 		headerParams[key] = a.Configuration.DefaultHeader[key]
 	}
 
+
 	// to determine the Content-Type header
 	localVarHttpContentTypes := []string{  }