apostrophe-schema-widgets

apostrophe-schema-widgets

apostrophe-schema-widgets is a widget builder for the Apostrophe content management system. You can easily configure any number of custom widgets using Apostrophe schemas.

Installation

npm install apostrophe-schema-widgets

Make sure you add it to package.json so it also installs on deployment.

Usage

In app.js, just configure the module:

'apostrophe-schema-widgets': {
  widgets: [
    {
      name: 'prettyLink',
      label: 'Pretty Link',
      instructions: 'Enter a label and paste a URL to create a link.',
      schema: [
        {
          name: 'label',
          type: 'string',
          label: 'Label',
          required: true
        },
        {
          name: 'url',
          type: 'url',
          label: 'URL',
          required: true
        }
      ]
    }
  ]
}

Here I've configured one simple widget, which has two fields in its editor, "label" and "URL."

Now, create a template for displaying this widget as the file lib/modules/apostrophe-schema-widgets/views/prettyLink.html:

<div class="so-pretty">
  <a href="{{ item.url | e }}">{{ item.label | e }}</a>
</div>

Note that your template can also access options passed to the widget via the options object.

Right away, this is useful. But it's a lot more useful if you use the "array" feature of schemas. This way we can edit an entire list of "pretty links" in a single place, which gives us more control over presentation.

In app.js:

'apostrophe-schema-widgets': {
  widgets: [
    {
      name: 'prettyLinks',
      label: 'Pretty Links',
      instructions: 'Click "add" to add your first link. Enter a label and paste a URL for each link.',
      type: 'array',
      schema: [
        {
          name: 'links',
          type: 'array',
          schema: [
            {
              name: 'label',
              type: 'string',
              label: 'Label',
              required: true
            },
            {
              name: 'url',
              type: 'url',
              label: 'URL',
              required: true
            }
          ]
        }
      ]
    }
  ]
}

And in lib/modules/apostrophe-schema-widgets/views/prettyLinks.html:

<ul class="so-pretty">
  {% for link in item.links %}
    <li><a href="{{ link.url | e }}">{{ link.label | e }}</a></li>
  {% endfor %}
</ul>

Joins in Schema Widgets

They work exactly like joins in snippet schemas.

If the current page contains a schema widget which results in a join with another page or snippet that also contains a schema widget, the second schema widget does not complete its joins. This is necessary to prevent infinite loops.

If you need nested joins, consider adding your joins to the schema of a fancy page rather than using schema widgets. If you take this approach you can use the withJoins option.

Extending Schema Widgets

If you need a custom loader to fetch more data, just subclass the module in lib/modules/apostrophe-schema-widgets/index.js. Here's an example in which we want to do extra work for the schema widget named menuBuilder:

module.exports = schemaWidgets;

function schemaWidgets(options, callback) {
  return new schemaWidgets.SchemaWidgets(options, callback);
}

schemaWidgets.SchemaWidgets = function(options, callback) {
  var self = this;

  module.exports.Super.call(this, options, null);

  var superLoad = self.widgets.menuBuilder.load;
  self.widgets.menuBuilder.load = function(req, item, callback) {
    return superLoad(req, item, function(err) {
      if (err) {
        return callback(err);
      }

      // Do your custom work here, add properties
      // to the item, then...

      return callback(null);
    });
  };

  if (callback) {
    process.nextTick(function() { return callback(null); });
  }
};

If you need to fetch more data that is dependent on all of the joins being hydrated, you can execute custom code after the widget is finished loading in your index.js:

self.widgets.menuBuilder.afterLoad = function(req, item, callback) {
  // Fetch more data
  return callback(null);
}

You also have afterConvertFields available to you for treating fields after they are sanitized. You can use it in index.js like this:

self.widgets.menuBuilder.afterConvertFields = function(req, item, callback) {
  // Do stuff to your fields here
  return callback(null);
}