Merge pull request #1312 from tdakkota/fix/issue-1310

fix(gen): initialize pointer generics

_testdata/positive/sample.json

@@ -798,6 +798,23 @@
           }
         }
       }
+    },
+    "/testIssue1310": {
+      "get": {
+        "operationId": "testIssue1310",
+        "responses": {
+          "200": {
+            "description": "OK",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Issue1310"
+                }
+              }
+            }
+          }
+        }
+      }
     }
   },
   "components": {
@@ -1973,6 +1990,27 @@
             "type": "string"
           }
         }
+      },
+      "Issue1310": {
+        "description": "An API error",
+        "type": "object",
+        "properties": {
+          "title": {
+            "description": "A short, human-readable summary of the problem type. This value should not change between occurrences of the error.",
+            "example": "Bad Request",
+            "type": "string"
+          },
+          "details": {
+            "description": "A human-readable explanation specific to this occurrence of the problem.",
+            "example": "Property foo is required but is missing.",
+            "type": "string"
+          },
+          "properties": {
+            "description": "Optional map of properties",
+            "nullable": true,
+            "type": "object"
+          }
+        }
       }
     },
     "parameters": {

gen/_template/json/encoders_generic.tmpl

@@ -74,7 +74,12 @@ func (o *{{ $.Name }}) Decode(d *jx.Decoder{{ if $g.Format }}, format func(*jx.D
 			return err
 		}
 		o.Value = v
-	{{- else if or ($g.IsStruct) ($g.IsEnum) ($g.IsPointer) ($g.IsSum) ($g.IsAlias)  }}
+	{{- else if $g.IsPointer }}
+		o.Value = new({{ $g.PointerTo.Go }})
+		if err := o.Value.Decode(d); err != nil {
+			return err
+		}
+	{{- else if or ($g.IsStruct) ($g.IsEnum) ($g.IsSum) ($g.IsAlias)  }}
 		if err := o.Value.Decode(d); err != nil {
 			return err
 		}

internal/integration/json_test.go

@@ -184,6 +184,21 @@ func TestJSONGenerics(t *testing.T) {
 			})
 		}
 	})
+	t.Run("Issue1310", func(t *testing.T) {
+		t.Parallel()
+
+		val := api.Issue1310{
+			Title:      api.NewOptString("Bad Request"),
+			Details:    api.NewOptString("This is an example error"),
+			Properties: api.NewOptIssue1310Properties(&api.Issue1310Properties{}),
+		}
+		encoded := encodeObject(&val)
+
+		var decoded api.Issue1310
+		decodeObject(t, encoded, &decoded)
+		require.Equal(t, val, decoded)
+		require.JSONEq(t, string(encoded), string(encodeObject(&decoded)))
+	})
 }
 
 func TestJSONArray(t *testing.T) {