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--- wiki2:python:django:models [2019/02/09 11:24]
alfred [Fields]
+++ wiki2:python:django:models [2020/05/09 09:25] (actual)
@@ Línea 1: / Línea 1: @@
 ====== Django Models ======
+===== Migrations =====
+<code>
+$ python manage.py makemigrations <app>
+</code>
+Will create migration files for all the apps if the ''app'' was not indicated.
+<code>
+$ python manage.py migrate
+</code>
+Will apply migrations to the configured DB.
 ===== Signals =====
@@ Línea 99: / Línea 110: @@
 </code>
+==== Choice ====
+<code>
+from django.db import models
+class Person(models.Model):
+    SHIRT_SIZES = (
+        ('S', 'Small'),
+        ('M', 'Medium'),
+        ('L', 'Large'),
+    )
+    name = models.CharField(max_length=60)
+    shirt_size = models.CharField(max_length=2, choices=SHIRT_SIZES)
+</code>
+Get its values
+<code>
+>>> p = Person(name="Fred Flintstone", shirt_size="L")
+>>> p.save()
+>>> p.shirt_size
+'L'
+>>> p.get_shirt_size_display()
+'Large'
+</code>
 ==== Special fields ====
@@ Línea 124: / Línea 158: @@
 ===== How to... =====
+==== Deal with performed queries ====
+See the current registered queries (with their times):
+<code>
+from django.db import connection
+connection.queries
+</code>
+See a concrete database queries:
+<code>
+from django.db import connections
+connections['my_db_alias'].queries
+</code>
+Delete the query array:
+<code>
+from django.db import reset_queries
+reset_queries()
+</code>
 ==== Get an app model ====
 <code>

Programming