Make the ref-selector function work properly for branch selection.

app/assets/javascripts/project.js

@@ -65,7 +65,8 @@
               url: $dropdown.data('refs-url'),
               data: {
                 ref: $dropdown.data('ref')
-              }
+              },
+              dataType: "json"
             }).done(function(refs) {
               return callback(refs);
             });
@@ -73,7 +74,7 @@
           selectable: true,
           filterable: true,
           filterByText: true,
-          fieldName: 'ref',
+          fieldName: $dropdown.data('field-name'),
           renderRow: function(ref) {
             var link;
             if (ref.header != null) {

app/views/projects/commit/_change.html.haml

@@ -17,13 +17,8 @@
           .form-group.branch
             = label_tag 'target_branch', target_label, class: 'control-label'
             .col-sm-10
-              .dropdown
-                = dropdown_toggle @project.default_branch, { toggle: "dropdown", selected: @project.default_branch, ref: @ref, refs_url: branches_namespace_project_path(@project.namespace, @project) }, { toggle_class: "js-project-refs-dropdown js-target-branch" }
-                .dropdown-menu.dropdown-menu-selectable
-                  = dropdown_title "Switch branch"
-                  = dropdown_filter "Search branches"
-                  = dropdown_content
-                  = dropdown_loading
+              = hidden_field_tag :target_branch, @project.default_branch, id: 'target_branch'
+              = dropdown_tag(@project.default_branch, options: { title: "Switch branch", filter: true, placeholder: "Search branches", toggle_class: 'js-project-refs-dropdown js-target-branch', dropdown_class: 'dropdown-menu-selectable', data: { field_name: "target_branch", selected: @project.default_branch, target_branch: @project.default_branch, refs_url: namespace_project_branches_path(@project.namespace, @project), submit_form_on_click: false }})
               - if can?(current_user, :push_code, @project)
                 .js-create-merge-request-container

app/views/shared/_ref_switcher.html.haml

@@ -6,7 +6,7 @@
   - @options && @options.each do |key, value|
     = hidden_field_tag key, value, id: nil
   .dropdown
-    = dropdown_toggle dropdown_toggle_text, { toggle: "dropdown", selected: dropdown_toggle_text, ref: @ref, refs_url: refs_namespace_project_path(@project.namespace, @project) }, { toggle_class: "js-project-refs-dropdown" }
+    = dropdown_toggle dropdown_toggle_text, { toggle: "dropdown", selected: dropdown_toggle_text, ref: @ref, refs_url: refs_namespace_project_path(@project.namespace, @project), field_name: 'ref', submit_form_on_click: true }, { toggle_class: "js-project-refs-dropdown" }
     .dropdown-menu.dropdown-menu-selectable{ class: ("dropdown-menu-align-right" if local_assigns[:align_right]) }
       = dropdown_title "Switch branch/tag"
       = dropdown_filter "Search branches and tags"