change parent works

categories/categories.go

@@ -48,6 +48,20 @@ func LoadCategories(db *sql.DB) {
 	}
 }
 
+func (category *Category) ChangeParent(db *sql.DB, parent *Category) error {
+    var err error 
+    if parent == nil {
+        _, err = db.Exec("UPDATE categories SET parent_id = NULL WHERE id = $1", category.Id)
+    } else {
+        _, err = db.Exec("UPDATE categories SET parent_id = $2 WHERE id = $1", category.Id, parent.Id)
+    }
+      
+    if err != nil {
+        fmt.Println("Categories DB Error: ", err)
+    }
+    return err
+}
+
 // get the number of parents a category has
 func (category *Category) Depth() int {
     depth := 0

js/funcs.js

@@ -23,10 +23,6 @@ $(document).ready( function () {
   });
   
   $(".category-change-parent").change(function (e) {
-    $.post("/categories/change-parent", 
-        {target: this.name, 
-        value: this.value}, 
-        function(data) { alert("reload"); location.reload(); }, 
-        "json");
+       e.target.parentElement.submit();
   });
 });

route_handlers.go

@@ -257,11 +257,37 @@ func categoriesPostHandler(w http.ResponseWriter, r *http.Request, user *user.Us
     http.Redirect(w, r, "/categories", http.StatusFound)
 }
 
+func categoryFromReqArg(arg string) *categories.Category {
+    if cid, err := strconv.Atoi(arg); err != nil {
+        return nil
+    } else if category, ok := categories.CategoriesFlat[cid]; !ok {
+        return nil
+    } else {
+        return category
+    }
+}
+
 func categoryChangeParentHandler(w http.ResponseWriter, r *http.Request, user *user.User) {
-    fmt.Println("categoryChangeParentHandler")
     session, _ := store.Get(r, "c_user")
-    session.AddFlash("change parent")
+
+	categories.LoadCategories(db)
+	category := categoryFromReqArg(r.FormValue("cid"))
+	parent := categoryFromReqArg(r.FormValue("parent"))
+	
+	
+	if category == nil {
+		session.AddFlash("Invalid category", flash_err)	
+	} else {
+	    err := category.ChangeParent(db, parent)
+	    if err != nil {
+	        session.AddFlash("Error commiting to Database", flash_err)
+	    } else {
+	    	session.AddFlash("Changed category parent", flash_info)
+	    }	
+    }
+	
     session.Save(r, w)
+    http.Redirect(w, r, "/categories", http.StatusFound)
 }
 
 func ServeFileHandler(res http.ResponseWriter, req *http.Request) {  

templates/pages/categories.html

@@ -23,16 +23,18 @@
             <a href="/categories/delete?id={{.category.Id}}">delete</a>
         </div>
         <div class="col-xs-3">
-    <select class="form-control category-change-parent" name="category-change-parent-{{.category.Id}}" >
-        <option value="-1" {{if not .category.Parent.Valid}} selected="true"{{end}}>-- None --</option>
-        {{range $category := .categories}}
-            {{if $.category.Parent.Valid }}
-                {{template "option-category" dict "category" $category "id" $.category.Parent.Value}}
-            {{else}}
-                {{template "option-category" dict "category" $category "id" -1}}
-            {{end}}
-        {{end}}
-    </select>
+        <form action="/categories/change-parent?cid={{.category.Id}}" method="POST">
+            <select class="form-control category-change-parent" name="parent" >
+                <option value="none" {{if not .category.Parent.Valid}} selected="true"{{end}}>-- None --</option>
+                {{range $category := .categories}}
+                    {{if $.category.Parent.Valid }}
+                        {{template "option-category" dict "category" $category "id" $.category.Parent.Value}}
+                    {{else}}
+                        {{template "option-category" dict "category" $category "id" -1}}
+                    {{end}}
+                {{end}}
+            </select>
+        </form>
         </div>
     </div>