fix: json/jsonb columns should not have type "string" in OpenAPI spec (#2203)

* Switch to no type for json/jsonb

test/spec/Feature/OpenApi/OpenApiSpec.hs

@@ -430,6 +430,34 @@ spec actualPgVersion = describe "OpenAPI" $ do
             }
           |]
 
+    it "json to any" $ do
+      r <- simpleBody <$> get "/"
+
+      let types = r ^? key "definitions" . key "openapi_types" . key "properties" . key "a_json"
+
+      liftIO $
+
+        types `shouldBe` Just
+          [aesonQQ|
+            {
+              "format": "json"
+            }
+          |]
+
+    it "jsonb to any" $ do
+      r <- simpleBody <$> get "/"
+
+      let types = r ^? key "definitions" . key "openapi_types" . key "properties" . key "a_jsonb"
+
+      liftIO $
+
+        types `shouldBe` Just
+          [aesonQQ|
+            {
+              "format": "jsonb"
+            }
+          |]
+
   describe "Detects default values" $ do
 
     it "text" $ do
@@ -548,12 +576,10 @@ spec actualPgVersion = describe "OpenAPI" $ do
                   "type": "integer"
                 },
                 "json": {
-                  "format": "json",
-                  "type": "string"
+                  "format": "json"
                 },
                 "jsonb": {
-                  "format": "jsonb",
-                  "type": "string"
+                  "format": "jsonb"
                 }
               },
               "type": "object",

test/spec/fixtures/schema.sql

@@ -1807,7 +1807,9 @@ CREATE TABLE test.openapi_types(
   "a_bigint" bigint,
   "a_numeric" numeric,
   "a_real" real,
-  "a_double_precision" double precision
+  "a_double_precision" double precision,
+  "a_json" json,
+  "a_jsonb" jsonb
 );
 
 CREATE TABLE test.openapi_defaults(