enable delete link

Gemfile

@@ -14,7 +14,7 @@ gem "jquery-rails"
 # your gem to rubygems.org.
 
 # To use debugger
-gem 'debugger'
+# gem 'debugger'
 group :development do
   #gem 'mysql2'#, '~> 0.3.7'
   gem "nifty-generators", :git => 'git://github.com/drhenner/nifty-generators.git'

app/assets/javascripts/validation_issues.js

@@ -1,2 +1,6 @@
 // Place all the behaviors and hooks related to the matching controller here.
 // All this logic will automatically be available in application.js.
+
+//= require jquery
+//= require jquery_ujs
+//= require_tree validation_issues

app/assets/javascripts/validation_issues/rails.js

@@ -0,0 +1,373 @@
+(function($, undefined) {
+
+/**
+ * Unobtrusive scripting adapter for jQuery
+ *
+ * Requires jQuery 1.6.0 or later.
+ * https://github.com/rails/jquery-ujs
+
+ * Uploading file using rails.js
+ * =============================
+ *
+ * By default, browsers do not allow files to be uploaded via AJAX. As a result, if there are any non-blank file fields
+ * in the remote form, this adapter aborts the AJAX submission and allows the form to submit through standard means.
+ *
+ * The `ajax:aborted:file` event allows you to bind your own handler to process the form submission however you wish.
+ *
+ * Ex:
+ *     $('form').live('ajax:aborted:file', function(event, elements){
+ *       // Implement own remote file-transfer handler here for non-blank file inputs passed in `elements`.
+ *       // Returning false in this handler tells rails.js to disallow standard form submission
+ *       return false;
+ *     });
+ *
+ * The `ajax:aborted:file` event is fired when a file-type input is detected with a non-blank value.
+ *
+ * Third-party tools can use this hook to detect when an AJAX file upload is attempted, and then use
+ * techniques like the iframe method to upload the file instead.
+ *
+ * Required fields in rails.js
+ * ===========================
+ *
+ * If any blank required inputs (required="required") are detected in the remote form, the whole form submission
+ * is canceled. Note that this is unlike file inputs, which still allow standard (non-AJAX) form submission.
+ *
+ * The `ajax:aborted:required` event allows you to bind your own handler to inform the user of blank required inputs.
+ *
+ * !! Note that Opera does not fire the form's submit event if there are blank required inputs, so this event may never
+ *    get fired in Opera. This event is what causes other browsers to exhibit the same submit-aborting behavior.
+ *
+ * Ex:
+ *     $('form').live('ajax:aborted:required', function(event, elements){
+ *       // Returning false in this handler tells rails.js to submit the form anyway.
+ *       // The blank required inputs are passed to this function in `elements`.
+ *       return ! confirm("Would you like to submit the form with missing info?");
+ *     });
+ */
+
+  // Shorthand to make it a little easier to call public rails functions from within rails.js
+  var rails;
+
+  $.rails = rails = {
+    // Link elements bound by jquery-ujs
+    linkClickSelector: 'a[data-confirm], a[data-method], a[data-remote], a[data-disable-with]',
+
+    // Select elements bound by jquery-ujs
+    inputChangeSelector: 'select[data-remote], input[data-remote], textarea[data-remote]',
+
+    // Form elements bound by jquery-ujs
+    formSubmitSelector: 'form',
+
+    // Form input elements bound by jquery-ujs
+    formInputClickSelector: 'form input[type=submit], form input[type=image], form button[type=submit], form button:not(button[type])',
+
+    // Form input elements disabled during form submission
+    disableSelector: 'input[data-disable-with], button[data-disable-with], textarea[data-disable-with]',
+
+    // Form input elements re-enabled after form submission
+    enableSelector: 'input[data-disable-with]:disabled, button[data-disable-with]:disabled, textarea[data-disable-with]:disabled',
+
+    // Form required input elements
+    requiredInputSelector: 'input[name][required]:not([disabled]),textarea[name][required]:not([disabled])',
+
+    // Form file input elements
+    fileInputSelector: 'input:file',
+
+    // Link onClick disable selector with possible reenable after remote submission
+    linkDisableSelector: 'a[data-disable-with]',
+
+    // Make sure that every Ajax request sends the CSRF token
+    CSRFProtection: function(xhr) {
+      var token = $('meta[name="csrf-token"]').attr('content');
+      if (token) xhr.setRequestHeader('X-CSRF-Token', token);
+    },
+
+    // Triggers an event on an element and returns false if the event result is false
+    fire: function(obj, name, data) {
+      var event = $.Event(name);
+      obj.trigger(event, data);
+      return event.result !== false;
+    },
+
+    // Default confirm dialog, may be overridden with custom confirm dialog in $.rails.confirm
+    confirm: function(message) {
+      return confirm(message);
+    },
+
+    // Default ajax function, may be overridden with custom function in $.rails.ajax
+    ajax: function(options) {
+      return $.ajax(options);
+    },
+
+    // Submits "remote" forms and links with ajax
+    handleRemote: function(element) {
+      var method, url, data,
+        crossDomain = element.data('cross-domain') || null,
+        dataType = element.data('type') || ($.ajaxSettings && $.ajaxSettings.dataType),
+        options;
+
+      if (rails.fire(element, 'ajax:before')) {
+
+        if (element.is('form')) {
+          method = element.attr('method');
+          url = element.attr('action');
+          data = element.serializeArray();
+          // memoized value from clicked submit button
+          var button = element.data('ujs:submit-button');
+          if (button) {
+            data.push(button);
+            element.data('ujs:submit-button', null);
+          }
+        } else if (element.is(rails.inputChangeSelector)) {
+          method = element.data('method');
+          url = element.data('url');
+          data = element.serialize();
+          if (element.data('params')) data = data + "&" + element.data('params');
+        } else {
+          method = element.data('method');
+          url = element.attr('href');
+          data = element.data('params') || null;
+        }
+
+        options = {
+          type: method || 'GET', data: data, dataType: dataType, crossDomain: crossDomain,
+          // stopping the "ajax:beforeSend" event will cancel the ajax request
+          beforeSend: function(xhr, settings) {
+            if (settings.dataType === undefined) {
+              xhr.setRequestHeader('accept', '*/*;q=0.5, ' + settings.accepts.script);
+            }
+            return rails.fire(element, 'ajax:beforeSend', [xhr, settings]);
+          },
+          success: function(data, status, xhr) {
+            element.trigger('ajax:success', [data, status, xhr]);
+          },
+          complete: function(xhr, status) {
+            element.trigger('ajax:complete', [xhr, status]);
+          },
+          error: function(xhr, status, error) {
+            element.trigger('ajax:error', [xhr, status, error]);
+          }
+        };
+        // Only pass url to `ajax` options if not blank
+        if (url) { options.url = url; }
+
+        return rails.ajax(options);
+      } else {
+        return false;
+      }
+    },
+
+    // Handles "data-method" on links such as:
+    // <a href="/users/5" data-method="delete" rel="nofollow" data-confirm="Are you sure?">Delete</a>
+    handleMethod: function(link) {
+      var href = link.attr('href'),
+        method = link.data('method'),
+        target = link.attr('target'),
+        csrf_token = $('meta[name=csrf-token]').attr('content'),
+        csrf_param = $('meta[name=csrf-param]').attr('content'),
+        form = $('<form method="post" action="' + href + '"></form>'),
+        metadata_input = '<input name="_method" value="' + method + '" type="hidden" />';
+
+      if (csrf_param !== undefined && csrf_token !== undefined) {
+        metadata_input += '<input name="' + csrf_param + '" value="' + csrf_token + '" type="hidden" />';
+      }
+
+      if (target) { form.attr('target', target); }
+
+      form.hide().append(metadata_input).appendTo('body');
+      form.submit();
+    },
+
+    /* Disables form elements:
+      - Caches element value in 'ujs:enable-with' data store
+      - Replaces element text with value of 'data-disable-with' attribute
+      - Sets disabled property to true
+    */
+    disableFormElements: function(form) {
+      form.find(rails.disableSelector).each(function() {
+        var element = $(this), method = element.is('button') ? 'html' : 'val';
+        element.data('ujs:enable-with', element[method]());
+        element[method](element.data('disable-with'));
+        element.prop('disabled', true);
+      });
+    },
+
+    /* Re-enables disabled form elements:
+      - Replaces element text with cached value from 'ujs:enable-with' data store (created in `disableFormElements`)
+      - Sets disabled property to false
+    */
+    enableFormElements: function(form) {
+      form.find(rails.enableSelector).each(function() {
+        var element = $(this), method = element.is('button') ? 'html' : 'val';
+        if (element.data('ujs:enable-with')) element[method](element.data('ujs:enable-with'));
+        element.prop('disabled', false);
+      });
+    },
+
+   /* For 'data-confirm' attribute:
+      - Fires `confirm` event
+      - Shows the confirmation dialog
+      - Fires the `confirm:complete` event
+
+      Returns `true` if no function stops the chain and user chose yes; `false` otherwise.
+      Attaching a handler to the element's `confirm` event that returns a `falsy` value cancels the confirmation dialog.
+      Attaching a handler to the element's `confirm:complete` event that returns a `falsy` value makes this function
+      return false. The `confirm:complete` event is fired whether or not the user answered true or false to the dialog.
+   */
+    allowAction: function(element) {
+      var message = element.data('confirm'),
+          answer = false, callback;
+      if (!message) { return true; }
+
+      if (rails.fire(element, 'confirm')) {
+        answer = rails.confirm(message);
+        callback = rails.fire(element, 'confirm:complete', [answer]);
+      }
+      return answer && callback;
+    },
+
+    // Helper function which checks for blank inputs in a form that match the specified CSS selector
+    blankInputs: function(form, specifiedSelector, nonBlank) {
+      var inputs = $(), input,
+        selector = specifiedSelector || 'input,textarea';
+      form.find(selector).each(function() {
+        input = $(this);
+        // Collect non-blank inputs if nonBlank option is true, otherwise, collect blank inputs
+        if (nonBlank ? input.val() : !input.val()) {
+          inputs = inputs.add(input);
+        }
+      });
+      return inputs.length ? inputs : false;
+    },
+
+    // Helper function which checks for non-blank inputs in a form that match the specified CSS selector
+    nonBlankInputs: function(form, specifiedSelector) {
+      return rails.blankInputs(form, specifiedSelector, true); // true specifies nonBlank
+    },
+
+    // Helper function, needed to provide consistent behavior in IE
+    stopEverything: function(e) {
+      $(e.target).trigger('ujs:everythingStopped');
+      e.stopImmediatePropagation();
+      return false;
+    },
+
+    // find all the submit events directly bound to the form and
+    // manually invoke them. If anyone returns false then stop the loop
+    callFormSubmitBindings: function(form, event) {
+      var events = form.data('events'), continuePropagation = true;
+      if (events !== undefined && events['submit'] !== undefined) {
+        $.each(events['submit'], function(i, obj){
+          if (typeof obj.handler === 'function') return continuePropagation = obj.handler(event);
+        });
+      }
+      return continuePropagation;
+    },
+
+    //  replace element's html with the 'data-disable-with' after storing original html
+    //  and prevent clicking on it
+    disableElement: function(element) {
+      element.data('ujs:enable-with', element.html()); // store enabled state
+      element.html(element.data('disable-with')); // set to disabled state
+      element.bind('click.railsDisable', function(e) { // prevent further clicking
+        return rails.stopEverything(e)
+      });
+    },
+
+    // restore element to its original state which was disabled by 'disableElement' above
+    enableElement: function(element) {
+      if (element.data('ujs:enable-with') !== undefined) {
+        element.html(element.data('ujs:enable-with')); // set to old enabled state
+        // this should be element.removeData('ujs:enable-with')
+        // but, there is currently a bug in jquery which makes hyphenated data attributes not get removed
+        element.data('ujs:enable-with', false); // clean up cache
+      }
+      element.unbind('click.railsDisable'); // enable element
+    }
+
+  };
+
+  $.ajaxPrefilter(function(options, originalOptions, xhr){ if ( !options.crossDomain ) { rails.CSRFProtection(xhr); }});
+
+  $(document).delegate(rails.linkDisableSelector, 'ajax:complete', function() {
+      rails.enableElement($(this));
+  });
+
+  $(document).delegate(rails.linkClickSelector, 'click.rails', function(e) {
+    var link = $(this), method = link.data('method'), data = link.data('params');
+    if (!rails.allowAction(link)) return rails.stopEverything(e);
+
+    if (link.is(rails.linkDisableSelector)) rails.disableElement(link);
+
+    if (link.data('remote') !== undefined) {
+      if ( (e.metaKey || e.ctrlKey) && (!method || method === 'GET') && !data ) { return true; }
+
+      if (rails.handleRemote(link) === false) { rails.enableElement(link); }
+      return false;
+
+    } else if (link.data('method')) {
+      rails.handleMethod(link);
+      return false;
+    }
+  });
+
+  $(document).delegate(rails.inputChangeSelector, 'change.rails', function(e) {
+    var link = $(this);
+    if (!rails.allowAction(link)) return rails.stopEverything(e);
+
+    rails.handleRemote(link);
+    return false;
+  });
+
+  $(document).delegate(rails.formSubmitSelector, 'submit.rails', function(e) {
+    var form = $(this),
+      remote = form.data('remote') !== undefined,
+      blankRequiredInputs = rails.blankInputs(form, rails.requiredInputSelector),
+      nonBlankFileInputs = rails.nonBlankInputs(form, rails.fileInputSelector);
+
+    if (!rails.allowAction(form)) return rails.stopEverything(e);
+
+    // skip other logic when required values are missing or file upload is present
+    if (blankRequiredInputs && form.attr("novalidate") == undefined && rails.fire(form, 'ajax:aborted:required', [blankRequiredInputs])) {
+      return rails.stopEverything(e);
+    }
+
+    if (remote) {
+      if (nonBlankFileInputs) {
+        return rails.fire(form, 'ajax:aborted:file', [nonBlankFileInputs]);
+      }
+
+      // If browser does not support submit bubbling, then this live-binding will be called before direct
+      // bindings. Therefore, we should directly call any direct bindings before remotely submitting form.
+      if (!$.support.submitBubbles && $().jquery < '1.7' && rails.callFormSubmitBindings(form, e) === false) return rails.stopEverything(e);
+
+      rails.handleRemote(form);
+      return false;
+
+    } else {
+      // slight timeout so that the submit button gets properly serialized
+      setTimeout(function(){ rails.disableFormElements(form); }, 13);
+    }
+  });
+
+  $(document).delegate(rails.formInputClickSelector, 'click.rails', function(event) {
+    var button = $(this);
+
+    if (!rails.allowAction(button)) return rails.stopEverything(event);
+
+    // register the pressed submit button
+    var name = button.attr('name'),
+      data = name ? {name:name, value:button.val()} : null;
+
+    button.closest('form').data('ujs:submit-button', data);
+  });
+
+  $(document).delegate(rails.formSubmitSelector, 'ajax:beforeSend.rails', function(event) {
+    if (this == event.target) rails.disableFormElements($(this));
+  });
+
+  $(document).delegate(rails.formSubmitSelector, 'ajax:complete.rails', function(event) {
+    if (this == event.target) rails.enableFormElements($(this));
+  });
+
+})( jQuery );