Fix #1264, allow bulk RPC call

test/Feature/RpcSpec.hs

@@ -349,6 +349,42 @@ spec =
           [json|"Hello, John"|]
           { matchHeaders = [matchContentTypeJson] }
 
+    context "bulk RPC" $ do
+      it "works with a scalar function an returns a json array" $
+        post "/rpc/add_them"
+          [json|[
+            {"a": 1, "b": 2},
+            {"a": 4, "b": 6},
+            {"a": 100, "b": 200}
+          ]|] `shouldRespondWith`
+          [json|
+            [3, 10, 300]
+          |] { matchHeaders = [matchContentTypeJson] }
+
+      it "works with a scalar function an returns a json array when posting CSV" $
+        request methodPost "/rpc/add_them" [("Content-Type", "text/csv")]
+          "a,b\n1,2\n4,6\n100,200"
+          `shouldRespondWith`
+          [json|
+            [3, 10, 300]
+          |]
+          { matchStatus  = 200
+          , matchHeaders = [matchContentTypeJson]
+          }
+
+      it "works with a non-scalar result" $
+        post "/rpc/get_projects_below?select=id,name"
+          [json|[
+            {"id": 1},
+            {"id": 5}
+          ]|] `shouldRespondWith`
+          [json|
+            [{"id":1,"name":"Windows 7"},
+             {"id":2,"name":"Windows 10"},
+             {"id":3,"name":"IOS"},
+             {"id":4,"name":"OSX"}]
+          |] { matchHeaders = [matchContentTypeJson] }
+
     context "only for GET rpc" $ do
       it "should fail on mutating procs" $ do
         get "/rpc/callcounter" `shouldRespondWith` 500

test/fixtures/schema.sql

@@ -1659,4 +1659,9 @@ CREATE TABLE test.openapi_types(
   "a_numeric" numeric,
   "a_real" real,
   "a_double_precision" double precision
-);
+);
+
+create function add_them(a integer, b integer)
+returns integer as $$
+  select a + b;
+$$ language sql;