Fix insert transform only keys in first row (#138)

* fix insert transform only keys that are in first row

* a better approach?

* adds a test description

src/toucan2/tools/transformed.clj

@@ -281,20 +281,15 @@
 
 ;;;; before insert
 
-;;; TODO -- this shares a lot of code with [[transform-update-changes]]
 (defn- transform-insert-rows [[first-row :as rows] k->transform]
   {:pre [(map? first-row) (map? k->transform)]}
-  ;; all rows should have the same keys, so we just need to look at the keys in the first row
-  (let [row-xforms (for [k     (keys first-row)
-                         :let  [xform (get k->transform k)]
-                         :when xform]
-                     (fn [row]
-                       (update row k (fn [v]
-                                       (if (some? v)
-                                         (xform v)
-                                         v)))))
-        row-xform  (apply comp row-xforms)]
-    (map row-xform rows)))
+  (let [x-forms (for [[k transform] k->transform]
+                  (fn [row]
+                    (if (some? (get row k))
+                      (update row k transform)
+                      row)))
+        x-form  (apply comp x-forms)]
+   (map x-form rows)))
 
 (m/defmethod pipeline/build [#_query-type     :toucan.query-type/insert.*
                              #_model          ::transformed.model

test/toucan2/tools/transformed_test.clj

@@ -543,3 +543,20 @@
       (is (= 'transforms-primary-method-model-2
              (generated-name `(transformed/deftransforms :model-2
                                 {:x {:in ~'inc}})))))))
+
+(derive ::venues.edn-category ::test/venues)
+
+(transformed/deftransforms ::venues.edn-category
+  {:category {:in  pr-str
+              :out (fn [s]
+                     (binding [*read-eval* false]
+                       (read-string s)))}})
+
+(deftest ^:parallel transform-insert-rows-test
+  (testing "insert multiple rows in which each row has different key set will still do transformation properly (#130)"
+    (is (= [{:name "Venue 1"}
+            {:name "Venue 2", :category "{:name \"Category 2\"}"}]
+           (#'toucan2.tools.transformed/transform-insert-rows
+             '[{:name "Venue 1"}
+               {:name "Venue 2", :category {:name "Category 2"}}]
+             (#'toucan2.tools.transformed/in-transforms ::venues.edn-category))))))