Propeller Helpers

While these helpers are not available in the layout level, they are available in all template files such as page or collection templates.

A propeller helper is an expression wrapped in curly braces, such as {{format_date}}.

When using these helpers within nested context, such as when rendering image or link fields, the syntax has a # preceeding the expression. See #each, or #sort_list for examples.

Check out the HandlebarsJS documentation for more helpers.


Add {{{help}}} to any of the template files to see which properties and fields are available for that page. All available properties and fields render as a bulleted list. Items in collections must be published in order to be accessible.

This does not render in production.

Variable names with [list] indicate that the field is an array of items. These fields require either the #each or #sort_list propellers.

Any desired properties or fields that are not listed when rendering help must be accessed via API calls or other methods.


This helper is for formatting both UNIX and UTC timestamps, and expects the following syntax:


STRING_PATTERN is a string that can be a custom strftime/MS or a builtin pre-format string.

Example string patterns:

April 16, 2016 // "%B %d, %Y"
April 16, 2016 10:00am // "%B %d, %Y %l:%M%P"
4/16/2016 // “d” or "%m/%d/%Y"
4/16/2016 10:00am // "%m/%d/%Y %l:%M%P"

Here are the available options for LOCALE:

au, ie, gb, us, jp

Full Example Markup and Output:

{{ format_date published_at "D" "jp" }} => 2016年5月27日

Built In Patterns:

NO PATTERN: May 27, 2016
PATTERN (d): 05/27/2016
PATTERN (D): 2016年5月27日
PATTERN (f): Friday, 27 May 2016 06:14
PATTERN (F): Friday, 27 May 2016 06:14:04
PATTERN (g): 05/27/2016 06:14
PATTERN (G): 05/27/2016 06:14:04
PATTERN (m): May 27
PATTERN (M): May 27
PATTERN (o): 2016-05-27T06:14:04.1650000+00:00
PATTERN (O): 2016-05-27T06:14:04.1650000+00:00
PATTERN (r): Fri, 27 May 2016 06:14:04 GMT
PATTERN (R): 05/27/2016 06:14:04
PATTERN (s): 2016-05-27T06:14:04
PATTERN (t): 06:14
PATTERN (T): 06:14:04
PATTERN (u): 2016-05-27 06:14:04Z
PATTERN (U): Friday, 27 May 2016 06:14:04
PATTERN : 2016 May
PATTERN (Y): 2016 May
PATTERN (ddd yyyy): Fri 2016
PATTERN (%B %d, %Y %l:%M%P): May 27, 2016 6:14am
PATTERN (%m/%d/%Y %l:%M%P): 05/27/2016 6:14am

Refer to for more information.


This helper is used to format any content entered in Admin as currency.

There are currently two formatting options for US Dollars.

Example Markup:

<p>{{format_currency this.price "usd"}}</p>
<p>{{format_currency this.price "usd" 2}}</p>

Example Output:



This helper is for pagination and uses the params property listed when rendering {{{help}}}.

The params fields can be combined to create query strings that specify the page number, item limit, sort options, and other info used to traverse through pages.

The following is a list of all possible fields on the params property and how to access them, followed by example usages:

page: {{}}  // The current page number
limit: {{params.limit}}  // The amount of items that can be displayed at a time
offset: {{params.offset}}  // The current interval of items being displayed (limit*(page-1))
sort: {{params.sort}}  // The field to sort by, e.g. permalink or id
order: {{params.order}}  // Either asc (ascending) or desc (descending) order
total_count: {{params.total_count}}  // The total amount of items
page_count: {{params.page_count}}  // The total amount of pages required to render all items
next_offset: {{params.next_offset}}  // The next interval of items to render
prev_offset: {{params.prev_offset}}  // The previous interval of items to render
next_page: {{params.next_page}}  // The next page number
prev_page: {{params.prev_page}}  // The previous page number
fetch_first: {{params.fetch_first}}  // The query string for the first page
fetch_last: {{params.fetch_last}}  // The query string for the last page
fetch_prev: {{params.fetch_prev}}  // The query string for the previous page
fetch_next: {{params.fetch_next}}  // The query string for the next page
fetch_first_offset: {{params.fetch_first_offset}}  // The query string for the first offset
fetch_last_offset: {{params.fetch_last_offset}}  // The query string for the last offset
fetch_prev_offset: {{params.fetch_prev_offset}}  // The query string for the previous offset
fetch_next_offset: {{params.fetch_next_offset}}  // The query string for the next offset

Using {{create_page_query}} with no options

If not specified, the following are the default parameters for {{create_page_query}}:

page: 1,
limit: 50,
sort: id,
order: asc

Example Markup:

<li><a href="mammals{{create_page_query}}">Mammals</a></li>

Example Output:

<li><a href="mammals?page=1&amp;limit=50&amp;sort=id&amp;order=asc">Mammals</a></li>

Using {{create_page_query}} with sort, order, and limit

Example Markup:

<li><a href="{{create_page_query sort='permalink' order='asc' limit='15'}}">Mammals</a></li>

Note: There is no need to specify the collection name if used within the collection's public path namespace.

Example Output:

<li><a href="?page=1&amp;limit=15&amp;sort=permalink&amp;order=asc">Mammals</a></li>

Traversing through pages using params fields

The params fields will use default values unless any were specified.

Note how order is asc in the following example output without specifying it in the markup.

Example Markup:

<li><a href="{{collection.public_path}}?page=3&limit={{params.limit}}&sort={{params.sort}}&order={{params.order}}">Page 3</a></li>

Example Output:

<li><a href="mammals?page=3&amp;limit=15&amp;sort=permalink&amp;order=asc">Page 3</a></li>

Traversing through pages using the params fetch fields

Links can be created to traverse through the pages by either page numbers, or offset intervals.

Example Markup:

<li><a href="{{params.fetch_first}}">Fetch First</a></li>
<li><a href="{{params.fetch_last}}">Fetch Last</a></li>
<li><a href="{{params.fetch_prev}}">Fetch Prev</a></li>
<li><a href="{{params.fetch_next}}">Fetch Next</a></li>
<li><a href="{{params.fetch_first_offset}}">Fetch First Offset</a></li>
<li><a href="{{params.fetch_last_offset}}">Fetch Last Offset</a></li>
<li><a href="{{params.fetch_next_offset}}">Fetch Next Offset</a></li>
<li><a href="{{params.fetch_prev_offset}}">Fetch Prev Offset</a></li>

Example Output from the first page of a /collection/index.html, with limit=15 and sort=permalink:

<li><a href="?page=1&amp;limit=15&amp;sort=permalink&amp;order=asc">Fetch First</a></li>
<li><a href="?page=4&amp;limit=15&amp;sort=permalink&amp;order=asc">Fetch Last</a></li>
<li><a href="?page=1&amp;limit=15&amp;sort=permalink&amp;order=asc">Fetch Prev</a></li>
<li><a href="?page=2&amp;limit=15&amp;sort=permalink&amp;order=asc">Fetch Next</a></li>
<li><a href="?offset=0&amp;limit=15&amp;sort=permalink&amp;order=asc">Fetch First Offset</a></li>
<li><a href="?offset=45&amp;limit=15&amp;sort=permalink&amp;order=asc">Fetch Last Offset</a></li>
<li><a href="?offset=15&amp;limit=15&amp;sort=permalink&amp;order=asc">Fetch Next Offset</a></li>
<li><a href="?offset=0&amp;limit=15&amp;sort=permalink&amp;order=asc">Fetch Prev Offset</a></li>


This is used to render items in a list. For more control use {{#sort_list}} instead. By default, if you use {{#each}} to render items in a collection on the collection index.html or categories.html view, items will be rendered by their permalink order. [BUG --- retrieves first 50 items created, then sorts. instead of sorting then retrieving]


This is used to sort items in lists. It is used in place of the #each helper.

When using this helper, you can set the list to sort by any "first level" alphabetical or date properties such as permalink, public path, published_on or created_at. Currently, it is not possible to use any nested properties for sorting, such as those in fields. Use the help propeller to check for available first level properties.

The syntax is as follows:

{{#sort_list array sort="property" order="asc"}} 
  <!--fields and markup--> 

Where array is the list of items

Where property is any first level property available on the items.

Where order is either asc or desc

Example on the index.html template of a collection, sorting all items by their sorting position, in ascending order:

{{#sort_list items sort="sorting_position" order="asc"}}
  <a href="{{slug}}">{{}}</a>

Example Output:

<a href="/mammals/view/hedgehog">hedgehog</a>
<a href="/mammals/view/rabbit">rabbit</a>
<a href="/mammals/view/cheetah">cheetah</a>

Example on the index.html template of a collection, sorting all items by their permalink, in descending order:

{{#sort_list items sort="permalink" order="desc"}}

Example Output: