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Diffstat (limited to 'tests/modeltests/custom_columns/models.py')
| -rw-r--r-- | tests/modeltests/custom_columns/models.py | 94 |
1 files changed, 73 insertions, 21 deletions
diff --git a/tests/modeltests/custom_columns/models.py b/tests/modeltests/custom_columns/models.py index e88fa80da2..1283da07cf 100644 --- a/tests/modeltests/custom_columns/models.py +++ b/tests/modeltests/custom_columns/models.py @@ -1,53 +1,105 @@ """ -17. Custom column names +17. Custom column/table names If your database column name is different than your model attribute, use the ``db_column`` parameter. Note that you'll use the field's name, not its column name, in API usage. + +If your database table name is different than your model name, use the +``db_table`` Meta attribute. This has no effect on the API used to +query the database. + +If you need to use a table name for a many-to-many relationship that differs +from the default generated name, use the ``db_table`` parameter on the +ManyToMany field. This has no effect on the API for querying the database. + """ from django.db import models -class Person(models.Model): +class Author(models.Model): first_name = models.CharField(maxlength=30, db_column='firstname') last_name = models.CharField(maxlength=30, db_column='last') def __str__(self): return '%s %s' % (self.first_name, self.last_name) + class Meta: + db_table = 'my_author_table' + ordering = ('last_name','first_name') + +class Article(models.Model): + headline = models.CharField(maxlength=100) + authors = models.ManyToManyField(Author, db_table='my_m2m_table') + + def __str__(self): + return self.headline + + class Meta: + ordering = ('headline',) + __test__ = {'API_TESTS':""" -# Create a Person. ->>> p = Person(first_name='John', last_name='Smith') ->>> p.save() +# Create a Author. +>>> a = Author(first_name='John', last_name='Smith') +>>> a.save() ->>> p.id +>>> a.id 1 ->>> Person.objects.all() -[<Person: John Smith>] +# Create another author +>>> a2 = Author(first_name='Peter', last_name='Jones') +>>> a2.save() + +# Create an article +>>> art = Article(headline='Django lets you build web apps easily') +>>> art.save() +>>> art.authors = [a, a2] ->>> Person.objects.filter(first_name__exact='John') -[<Person: John Smith>] +# Although the table and column names on Author have been set to +# custom values, nothing about using the Author model has changed... ->>> Person.objects.get(first_name__exact='John') -<Person: John Smith> +# Query the available authors +>>> Author.objects.all() +[<Author: Peter Jones>, <Author: John Smith>] ->>> Person.objects.filter(firstname__exact='John') +>>> Author.objects.filter(first_name__exact='John') +[<Author: John Smith>] + +>>> Author.objects.get(first_name__exact='John') +<Author: John Smith> + +>>> Author.objects.filter(firstname__exact='John') Traceback (most recent call last): ... -TypeError: Cannot resolve keyword 'firstname' into field +TypeError: Cannot resolve keyword 'firstname' into field. Choices are: article, id, first_name, last_name ->>> p = Person.objects.get(last_name__exact='Smith') ->>> p.first_name +>>> a = Author.objects.get(last_name__exact='Smith') +>>> a.first_name 'John' ->>> p.last_name +>>> a.last_name 'Smith' ->>> p.firstname +>>> a.firstname Traceback (most recent call last): ... -AttributeError: 'Person' object has no attribute 'firstname' ->>> p.last +AttributeError: 'Author' object has no attribute 'firstname' +>>> a.last Traceback (most recent call last): ... -AttributeError: 'Person' object has no attribute 'last' +AttributeError: 'Author' object has no attribute 'last' + +# Although the Article table uses a custom m2m table, +# nothing about using the m2m relationship has changed... + +# Get all the authors for an article +>>> art.authors.all() +[<Author: Peter Jones>, <Author: John Smith>] + +# Get the articles for an author +>>> a.article_set.all() +[<Article: Django lets you build web apps easily>] + +# Query the authors across the m2m relation +>>> art.authors.filter(last_name='Jones') +[<Author: Peter Jones>] + """} |
