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A tool to assist with metadata for social media.

Project description

===============
wagtail-metadata
===============

A tool to assist with metadata for social media and search engines.

Compatibility
==========

Wagtail-metadata works with Wagtail v1.12 and upwards.

Installing
==========

First, install using pip::

pip install wagtail-metadata

Then add ``wagtailmetadata`` to your project's ``INSTALLED_APPS``:

.. code-block:: python

INSTALLED_APPS = [
'home',
'search',
# etc...

'wagtail.contrib.settings',
'wagtail.contrib.modeladmin',
# etc...

# Add the following:
'wagtailmetadata',

]

Using
=====

Pages should inherit from ``wagtailmetadata.models.MetadataPageMixin``.
This provides a ``search_image`` field in the Wagtail interface for that page type.
The description for the page will be pulled from the ``search_description`` page.
Metadata for the page will then be built from the page details.


.. code-block:: python

from wagtail.wagtailcore.models import Page
from wagtailmetadata.models import MetadataPageMixin

class ContentPage(MetadataPageMixin, Page):
pass

.. note::

Ensure you put ``MetadataPageMixin`` before ``Page``.

If you want to use this with a non-page model,
or want to use a different implementation for the fields,
you can inherit from ``wagtailmetadata.models.MetadataMixin``.
You will need to implement the following methods:

.. code-block:: python

from wagtailmetadata.models import MetadataMixin

class CustomObject(MetadataMixin, object):

def get_meta_title(self):
"""The title of this object"""
return "My custom object"

def get_meta_url(self):
"""The URL of this object, including protocol and domain"""
return "http://example.com/my-custom-object/"

def get_meta_description(self):
"""
A short text description of this object.
This should be plain text, not HTML.
"""
return "This thing is really cool, you should totally check it out"

def get_meta_image(self):
"""A relevant Wagtail Image to show. Optional."""
return self.some_image

def get_meta_twitter_card_type(self):
"""
What kind of Twitter card to show this as.
Defaults to ``summary_large_photo`` if there is a meta image,
or ``summary`` if there is no image. Optional.
"""
return "summary_large_photo"


Display
=======

Django
------

To use this in a template, first load the template tag library,
and then insert the metadata by placing ``{% meta_tags %}`` into the ``<head>``:

.. code-block:: html+django

{% load wagtailmetadata_tags %}
{% meta_tags %}

By default, this will look for a ``self`` object in the context to pull the metadata from.
You can specify a different object to use if you need to:

.. code-block:: html+django

{% load wagtailmetadata_tags %}
{% meta_tags my_custom_object %}

Jinja2
------

Add ``wagtailmetadata.jinja2tags.WagtailMetadataExtension`` to the template extensions
in your ``settings.py``:

.. code-block:: python

TEMPLATES = [
{
'BACKEND': 'django.template.backends.jinja2.Jinja2',
'OPTIONS': {
'extensions': [
'wagtailmetadata.jinja2tags.WagtailMetadataExtension'
],
},
}
]

Insert the metadata by placing ``{{ meta_tags() }}`` into the ``<head>``:

.. code-block:: html

{{ meta_tags() }}

By default, this will look for a ``page`` object in the context to pull the metadata from.
You can specify a different object to use if you need to:

.. code-block:: html

{{ meta_tags(my_custom_object) }}

Adding extra tags
=================

If you need to add extra meta tags, to add the twitter:site tag for example,
you can extend the Wagtail Metadata template.
First, create any models that you might need to hold the extra data:

.. code-block:: python

from wagtail.contrib.settings.models import BaseSetting, register_setting

@register_setting
class TwitterName(BaseSetting):
handle = models.CharField(max_length=20)

You could also add extra fields to a page model and output them as meta tags:

.. code-block:: python

class MyPage(MetadataPageMixin, Page):
body = RichTextField()
author_twitter_handle = models.CharField(max_length=20)

Then, override the ``wagtailmetadata/parts/tags.html`` template
and add your tags to the relevant blocks:

.. code-block:: html

{% extends "wagtailmetadata/parts/tags.html" %}

{% block twitter %}
{{ block.super }}
<meta name="twitter:site" content="@{{ settings.myapp.TwitterName.twitter_handle }}" />
<meta name="twitter:creator" content="@{{ model.author_twitter_handle }}" />
{% endblock %}

The ``wagtailmetadata/parts/tags.html`` template defines the following blocks
you can override or extend:

``{% block tags %}``
This block surrounds the whole template.
You can override this block to append extra tags before or after the standard tags.

``{% block twitter %}``
This block surrounds the Twitter card tags.

``{% block opengraph %}``
This block surrounds the Open Graph tags

``{% block meta %}``
This block surrounds the standard meta tags defined in HTML.


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