/django-learning

Primary LanguagePython

django-learning

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django template

  • {{ var }} to add variable
  • {% ... %} to add logic such as for loop / if clause
  • {# ... #} for comment
  • {{ var | 过滤器}} used to modify the variable here

django models

from django.db import models
  • primary key is auto generated if not provided
  • logic delete v.s. physical delete
    • logic delete is setting is_delete to True, the data is still present in the data base
    • physical delete means the data will be removed from the database
  • common field types
    • AutoField
    • CharField
    • TextField
    • IntegerField
    • DecimalField
    • FloatField
    • BooleanField
    • DateField
    • TimeField
    • DateTimeField
    • FieldField: used for file (less common) => use object storage
    • ImageField: used for image (less common) => use object storage
  • common filed type arguments:
    • null = True: can be null
    • blank = True:
    • primary_key = True: set a field to be primary key
    • DateField.auto_now: when the object was last modified
    • DateField.auto_now_add: when the object was first created
    • choices
    • max_length
    • default
    • name|db_column
    • unique = True
    • db_index = True