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Django: adding new admin_tags

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First: create a file under djangoapp/templatetags where you define your tags [e.g.: myadmin_tags.py]:

Second: create the html snippets that get loaded in those tags [e.g., personfactoid_info.html]:

Third: in mytemplates/admin/ modify change_form.html (if you don't have it just copy it from the django-admin app). You must add a placeholder for the new templatetags (probably you want to add it at the bottom of the page):

FOurth: create a new change_form.html in the same directory as above, but under your model template [e.g., mytemplates/admin/myapp/mymodel/change_form.html] so to override the behaviour just for that. The 'object_id' variable is passed by the admin template by default:

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  1. # FIRST:
  2.  
  3. from django import template 
  4. from poms.pomsapp import models
  5.  
  6. register = template.Library() 
  7.  
  8. # for People template
  9.  
  10. @register.inclusion_tag('admin/snippets/personfactoid_info.html') 
  11. def display_personfactoids(person_id): 
  12.     person = models.Person.objects.get(id__exact=person_id) 
  13.     # factoids = models.Factoids.objects.filter(people=person)
  14.     return { 'person': person }
  15.  
  16.  
  17. ## SECOND:
  18.  
  19. {% if person.assocfactoidperson_set.all %}
  20.  
  21. <b>Person associated to factoids:</b></br />
  22.  
  23. 	<table>
  24. 	  <tr>
  25. 	    <th>Record ID</th>
  26. 		<th>Type</th>
  27. 	    <th>Short Summary</th>
  28. 		<th>Role</th>
  29. 	    <th>Source</th>
  30. 	  </tr>
  31.  
  32. 	{% for a in person.assocfactoidperson_set.all %}
  33. 	  <tr>
  34. 	    <td>{{a.factoid.id}}</td>
  35. 		<td>{{a.factoid.get_right_subclass.0}}&#160;&#160;&#160;&#160;</td>
  36. 	    <td><a href="{% url factoid_detail a.factoid.id %}" title="click to show">{{a.factoid}}</a></td>
  37. 	    <td>{{a.role}}</td>
  38. 	    <td><a href="{% url source_detail a.factoid.sourcekey.id %}" title="click to show">{{a.factoid.sourcekey}}</a></td>
  39. 	  </tr>
  40. 	{% endfor %}
  41.  
  42. 	</table>
  43.  
  44. 	<br /><hr><hr><hr><br />
  45. {% endif %}
  46.  
  47.  
  48.  
  49. ## THIRD
  50.  
  51. ........
  52.  
  53. {% block related_items_block %}{% endblock %}
  54.  
  55. ........
  56.  
  57.  
  58. ## FOURTH 
  59.  
  60. {% extends "admin/change_form.html" %} 
  61. {% load myadmin_tags %} 
  62. {% block related_items_block %}
  63. <h2>Additional information:</h2><br />
  64.  
  65.   	{% if object_id %}
  66. 		{% display_personfactoids object_id %}
  67. 	{% endif %} 
  68.  
  69.  {% endblock %}

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