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![Django.make_an_app()>>> TrueDjango.log_in_user()>>> TrueDjango.comment_on_my_model()>>> TrueDjango.message_my_user(user='myuser')>>> TrueDjango.send_emails( emails=['me@mail.com'] )>>> TrueDjango.do_complex_SQL( please=True )>>> No Problem!](https://image.slidesharecdn.com/meetupdjangocommonproblems1-110511222159-phpapp02/75/Meetup-django-common_problems-1-8-2048.jpg)
![HaystackSearchQuerySet().filter( SQ(field=True) | SQ(field__relation="something") ~SQ(field=False) )>>> [ <SearchResult>, <SearchResult>, <SearchResult> ]](https://image.slidesharecdn.com/meetupdjangocommonproblems1-110511222159-phpapp02/75/Meetup-django-common_problems-1-19-2048.jpg)
![XapianclassArticleIndexer( Indexer ):fields = ['title','body']tags = [('title','title', 3),('body', 'as_plain_text', 1)]space.add_index(Article, ArticleIndexer, attach_as='indexer')](https://image.slidesharecdn.com/meetupdjangocommonproblems1-110511222159-phpapp02/75/Meetup-django-common_problems-1-20-2048.jpg)
![Xapianfromdjapian.indexer import CompositeIndexerflags = xapian.QueryParser.FLAG_PARTIAL| \xapian.QueryParser.FLAG_WILDCARDindexers = [ Model_1.indexer, Model_2.indexer ]comp = CompositeIndexer( *indexers )s = comp.search( `a phrase` ).flags( flags )>>> [ <hit:score=100>,<hit:score=98> ]$ s[0].instance>>> <ModelInstance:Model>](https://image.slidesharecdn.com/meetupdjangocommonproblems1-110511222159-phpapp02/75/Meetup-django-common_problems-1-21-2048.jpg)
![PistonclassMyHandler( BaseHandler ): methods_allowed =( 'GET', 'PUT') model = MyModel classMyOtherHandler( BaseHandler ): methods_allowed =( 'GET', 'PUT') model = MyOtherModelfields = ('title','content',('author',('username',) ) )exclude = ('id', re.compile(r'^private_'))defread( self, request):return [ x for x in MyOtherModel.objects.select_related() ]defupdate( self, request ):...](https://image.slidesharecdn.com/meetupdjangocommonproblems1-110511222159-phpapp02/75/Meetup-django-common_problems-1-44-2048.jpg)
![TastypieclassMyResource( ModelResource ):fk_field = fields.ForiegnKey( OtherResource, 'fk_field' ) classMeta:authentication = ApiKeyAuthentication() queryset = MyModel.object.all()resource_name = 'resource'fields = ['title', 'content', ]allowed_methods = [ 'get' ]filtering = {'somfield': ('exact', 'startswith')}defdehydrate_FOO( self, bundle ):return bundle.data[ 'FOO' ] = 'What I want'](https://image.slidesharecdn.com/meetupdjangocommonproblems1-110511222159-phpapp02/75/Meetup-django-common_problems-1-45-2048.jpg)
![QUERYSET-TRANSFORMdeflookup_tags(item_qs):item_pks = [item.pk for item in item_qs]m2mfield = Item._meta.get_field_by_name('tags')[0]tags_for_item = \Tag.objects.filter(item__in = item_pks).extra(select = {'item_id': '%s.%s' % (m2mfield.m2m_db_table(),m2mfield.m2m_column_name()) }) tag_dict = {}for tag in tags_for_item:tag_dict.setdefault(tag.item_id, []).append(tag)for item in item_qs:item.fetched_tags = tag_dict.get(item.pk, [])](https://image.slidesharecdn.com/meetupdjangocommonproblems1-110511222159-phpapp02/75/Meetup-django-common_problems-1-80-2048.jpg)
Uploaded byEric Satterwhite
Meetup django common_problems(1)
This document provides an overview of various Django tools and libraries for common tasks like searching, databases, APIs, content management, and images. It summarizes popular options like Haystack for searching, South for database migrations, Tastypie for REST APIs, Django CMS for content management, and ImageKit for image handling. Code samples and comparisons are provided to illustrate the capabilities and advantages of each tool.
Meetup django common_problems(1)
- 2. Who is thisfool?!A little about me
- 3. Graphic ArtPhotographyWeb DesignDjangoVFXJavaScriptPrintDesignSoftwareDigital MediaCSSPythonFlash / Flex
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- 7. Django = HotPileOfAwesome(yes=True )Django.build_web_app( fast=True )
- 8. Django.make_an_app()>>> TrueDjango.log_in_user()>>> TrueDjango.comment_on_my_model()>>>TrueDjango.message_my_user(user='myuser')>>> TrueDjango.send_emails( emails=['me@mail.com'] )>>> TrueDjango.do_complex_SQL( please=True )>>> No Problem!
- 9. Django.make_a_thumbnail()>>> Thumbnail?Django.send_text_message()>>> EmailException: no such thingDjango.search_all_my_stuff()>>> WTF?Django.get_data_in_under_75_queries()>>> Whoa...Django.alter_table(model='MyModel')>>> Let's not get crazyDjango.be_restful( now=True )>>> you meanrequest.POST
- 10. I've Got anapp for that!
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- 12.
- 13. SearchingFind Stuff -Fast( without crushing my DB )
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- 15. DjangoMyModel.objects.filter( text__icontains='word' )ORMyModel.objects.filter( text__search='word' )Problems:single model
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- 18. manual DB configsHaystackclassPostIndex(SearchIndex ): body = CharField(document = True, model_attr = 'body') title = CharField( model_attr = 'title') author = CharField( model_attr = 'author__get_full_name')text = CharField( use_template = True ) defget_queryset( self ): return Post.objects.all() defprepare_url( self, obj ): return obj.get_absolute_url() site.register(Post, PostIndex)
- 19. HaystackSearchQuerySet().filter( SQ(field=True) |SQ(field__relation="something") ~SQ(field=False) )>>> [ <SearchResult>, <SearchResult>, <SearchResult> ]
- 20. XapianclassArticleIndexer( Indexer ):fields= ['title','body']tags = [('title','title', 3),('body', 'as_plain_text', 1)]space.add_index(Article, ArticleIndexer, attach_as='indexer')
- 21. Xapianfromdjapian.indexer import CompositeIndexerflags= xapian.QueryParser.FLAG_PARTIAL| \xapian.QueryParser.FLAG_WILDCARDindexers = [ Model_1.indexer, Model_2.indexer ]comp = CompositeIndexer( *indexers )s = comp.search( `a phrase` ).flags( flags )>>> [ <hit:score=100>,<hit:score=98> ]$ s[0].instance>>> <ModelInstance:Model>
- 22. HaystackXapianIndex filesClass BasedIndexCustomize Text For IndexingLink to Indexed ObjectIndex Fields, Methods & RelationsStemming, Facetting, Highlighting, SpellingPluggable Architecture
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- 28. Templates & Tags
- 29. Views, Forms &Fields
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- 32. Doesn't Load Allindexers
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- 34. Close to themetal ( Control )
- 35. Watches Models forchanges
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- 37.
- 38. REST APIExposing YourData( In a meaningful way )
- 39. Djangodefview_func( reqeuest, *args,**kwargs): request.GET request.POST request.FILESProblems:PUT & DELETE not translated
- 40. Can't restrict accessbased on HTTP methods
- 41. Serialization is leftup to you
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- 43.
- 44. PistonclassMyHandler( BaseHandler ): methods_allowed =( 'GET', 'PUT') model = MyModel classMyOtherHandler( BaseHandler ): methods_allowed =( 'GET', 'PUT') model = MyOtherModelfields = ('title','content',('author',('username',) ) )exclude = ('id', re.compile(r'^private_'))defread( self, request):return [ x for x in MyOtherModel.objects.select_related() ]defupdate( self, request ):...
- 45. TastypieclassMyResource( ModelResource ):fk_field= fields.ForiegnKey( OtherResource, 'fk_field' ) classMeta:authentication = ApiKeyAuthentication() queryset = MyModel.object.all()resource_name = 'resource'fields = ['title', 'content', ]allowed_methods = [ 'get' ]filtering = {'somfield': ('exact', 'startswith')}defdehydrate_FOO( self, bundle ):return bundle.data[ 'FOO' ] = 'What I want'
- 46. Tastypie - ClientSidenewRequest.JSONP({url:'http://www.yoursite.com/api/resource',method:'get',data:{username:'billyblanks',api_key:'5eb63bbbe01eeed093cb22bb8f5acdc3',title__startswith:"Hello World"},onSuccess: function( data ){console.info( data.meta );console.log( data.objects ):}).send();http://www.yoursite.com/api/resource/1http://www.yoursite.com/api/resource/set/1;5http://www.yoursite.com/api/resource/?format=xml
- 47. PISTONTASTYPIEMultiple FormatsThrottlingAll HTTPMethodsAuthenticationArbitrary Data ResourcesHighly ConfigurableDjango-like
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- 51. ORM ablities (client )
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- 53. Object Caching (backends )
- 54. De / Rehydrations hooks
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- 58. OAuth / contribAuth
- 59.
- 60. Auto API DocsREADYIN MINUTES
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- 65. DJANGO$ python manage.pysyncdb
- 66. DJANGO$ python manage.pysyncdb>>> You have a new Database!
- 67. DJANGOclassMyModel( models.Model):relation =models.ForiegnKey( Model2 )
- 68. DJANGOclassMyModel( models.Model ):relation= models.ForiegnKey( Model2 )classMyModel( models.Model ):relation = models.ManyToMany( Model2 )
- 69. DJANGO$ python manage.pysyncdb
- 70. DJANGO$ python manage.pysyncdb>>> Sucks to be you!
- 71.
- 72. DJANGO$ python manage.pysyncdb>>> Sucks to be you!Problem:syncdb doesn't really sync your db. Migrations must be done manually.For everyedatabase / set up.SOUTHMigrations are a set of sequential .py filesdb agnosticHandle most relation typesRolls migrations forward Handles Dependancies / Reverse DependanciesCan convert existing apps Overrides existing syncdb commandDJANGOclassMyModel( models.Model ):relation = models.ForiegnKey( Model2 )classMyModel( models.Model ):relation = models.ManyToMany( Model2 )
- 73. DJANGOclassMyModel( models.Model ):relation= models.ForiegnKey( Model2 )classMyModel( models.Model ):relation = models.ManyToMany( Model2 )
- 74. SOUTH$ python manage.pyschemamigration <yourapp>>>> Sweet, run migrate
- 75. SOUTH$ python manage.pymigrate <yourapp>>>> Done.
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- 77.
- 78. QUERYSET-TRANSFORM{%for object inobject_list %}{%for object in object.things.all %}{%if object.relation %}{{ object.relation.field.text }}{%else%}{{ object.other_relation }}{%endif%}{%endfor%}{%empty%}no soup for you{%endfor%}
- 80. QUERYSET-TRANSFORMdeflookup_tags(item_qs):item_pks = [item.pkfor item in item_qs]m2mfield = Item._meta.get_field_by_name('tags')[0]tags_for_item = \Tag.objects.filter(item__in = item_pks).extra(select = {'item_id': '%s.%s' % (m2mfield.m2m_db_table(),m2mfield.m2m_column_name()) }) tag_dict = {}for tag in tags_for_item:tag_dict.setdefault(tag.item_id, []).append(tag)for item in item_qs:item.fetched_tags = tag_dict.get(item.pk, [])
- 81. QUERYSET-TRANSFORMqs = Item.objects.filter(name__contains= 'e').transform(lookup_tags)
- 82. QUERYSET-TRANSFORMfrom django.db importconnectionlen( connection.queries )>>> 2
- 83.
- 84. DJANGO-SELECTREVERSETries prefetching onreverse relationsmodel_instance.other_model_set.all()
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- 87.
- 88.
- 89.
- 90. WEBCUBE-CMSFeature CompleteRobust &Flexible( Commercial License )
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- 92.
- 94. + $300 /mo
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- 102.
- 103. Front-End Editing (latest )
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- 107. Lots Of Settings( again )
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- 109.
- 110. Plugins a littlewonkySATCHMO
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- 125.
- 126. DJANGOclassMyModel( models.Model ):image= models.ImageField(upload_to='/' )
- 127. DJANGOclassMyModel( models.Model ):image= models.ImageField( upload_to='/' )thumb = models.ImageField( upload_to='/' )
- 128. DJANGOclassMyModel( models.Model ):image= models.ImageField( upload_to='/' )thumb = models.ImageField( upload_to='/' )>>> MyModel.objects.get(pk=1)>>> MyModel.objects.image.url>>> MyModel.objects.thumb.url
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- 130.
- 131.
- 132. IMAGEKITclassPhoto( ImageModel ):name= models.CharField(max_length=100)image = models.ImageField(upload_to='photos') views = models.PositiveIntegerField(default=0)classIKOptions:#define the ImageKit optionsspec_module = 'myapp.specs'cache_dir = 'photos'image_field = 'image'save_count_as = 'views'
- 133. IMAGEKITclassResizeThumb( processors.Resize ):width= 100height = 75crop = TrueclassResizeDisplay( processors.Resize ):width = 600# now we can define our thumbnail specclassThumbnail( ImageSpec ):access_as = 'thumbnail_image'pre_cache = Trueprocessors = [ ResizeThumb ]classDisplay( ImageSpec ):increment_count = Trueprocessors = [ ResizeDisplay ]
- 134. IMAGEKIT$ photo =Photo.objects.get( pk =1 )$ photo.display.url>>> u'/path/to/media/photo_display.jpg'$ photo.thumbnail.width>>> 100
- 135. IMAGEKITPHOTLOGUECachingTemplate FriendlyHighly ConfigurableManagementCommandsOnly 1 Model
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- 137.
- 138.
- 139.
- 140. Galleries out ofthe box
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- 144.
- 145. 4 Models (2 Solid )
- 146. Templates / Views/ Urls
- 147. Exif SupportEXIF TAGSISSUE153( shameless plug )
- 148. IMAGEKITPHOTLOGUECachingTemplate FriendlyHighly ConfigurableManagementCommandsOnly 1 Model
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- 151.
- 152.
- 153. Galleries out ofthe box
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- 157.
- 158. 4 Models (2 Solid )
- 159. Exif SupportBeware ofView Counts
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- 161.
- 162.
- 163. SORLfrom sorl.thumbnail importImageFieldclassMyModel( models.Model ):iamge = ImageField( upload_to="/folder" )
- 164. SORL{% load thumbnail%}{%thumbnail obj.image "1000x600" crop='top' as im %}<img src="{{ im.url }}" />{%endthumbnail%}
- 165.
- 166. User - to- UserMessaging
- 167.
- 168.
- 169. DJANGO-SMSUser Enters Phone#User Selects Carrier
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- 173.
- 174. DJANGO-EXTENSIONS21 Commands4 Fields2Models1 Admin Extension ( FK AutoComplete )$ python manage.py dumpscript>>> your_app.py$ python manage.py runscript>>> your_app.pyc$ python manage.py runserver_plus>>> Debugger baked right in$ python manage.py shell_plus>>> AutoLoad Models$ python manage.py show_urls>>> /your/endpoint/:idproject.app.views.view_func
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- 182.
- 183. HOTSAUCEI Put That$*!T On Everything
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