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资源说明：This is a seo app. You can define your own algo from the admin panel based on the url or regular expressioned url
What it does:
This app is useful when:
1. You want to put the static seo content on the specific page.
2. You want to put the customized ( based on the regular expressioned url) seo content on the page.
Advantage: You can directly call the view variables while configuring the seo content to display the seo content.
Requirements for this app:
1. This app works for Django 1.3 and above.
2. This app works only when each view within various apps of the project
returns a TemplateResponse( not render_to_response ) which is a SimpleTemplateResponse object
for more info read : https://docs.djangoproject.com/en/dev/ref/template-response/
To use this app:
1. Install the seo directory somewhere in your python path
2. Add 'seo' to INSTALLED_APPS in settings.py
3. Add 'seo.middleware.MetaDataMiddleware' to MIDDLEWARE_CLASSES in settings.py
4. Include url(r'^seo/', include('seo.urls')), into your urls.py.
5. Add reference {{ seo_meta_data }} in your (eg base) template
Model Definition:
1. regular_expression: a boolean field choices a) static_url, b) dynamic_url
2. path: url path of the page or the regular expression of the page
3. title : a char field.
4. keywords: a text field.
5. description: a text field.
Admin Outlook:
regular_expression:
If selected NO: the path remains a char field and user may enter complete url
for the page he wants a static seo data to be displayed.
If selected YES: the path field gets populated with list (select-field drop-down) of regex-es for which the
administrator wants to display a logical data on all regex matches.
Middleware definition for seo app.
MetaDataMiddleware
This middleware function is called for all the views returning a SimpleTemplateResponse object( TemplateResponse ).
**Unlike render_to_response when a view returns a TemplateResponse the template is not rendered until all the middleware
checks are complete. This gives us a handle of the context data in process_template_response, which can be changed, overriden or
added here.
**Here process_template_response processes various factors based on following steps to compute meta data for a particular url
::Checks for complete current path in MetaData table.
If found:
a) The corresponding title, keywords and description is computed and set for display as meta tags.
If Not found:
b) It does a regex match for the current url and if found a match in MetaData table, the following steps take place:
>> (definition get_meta_info() is responsible for this)- It checks for corresponding entry for title, keywords and description
and renders it with the context data returned by the current view in process.
>> If no match is found get_meta_info() returns a default text for the respective meta tags ( DEFUALT_META_DATA )
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