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Refactored get_date_trunc_sql() to DatabaseOperations.date_trunc_sql(). Refs #5106

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git-svn-id: http://code.djangoproject.com/svn/django/trunk@5952 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Adrian Holovaty 2007-08-19 22:47:43 +00:00
parent aab04a4c2f
commit 5f51f0524a
10 changed files with 67 additions and 67 deletions
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27
django/db/backends/mysql/base.py
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@ -58,6 +58,19 @@ class DatabaseOperations(BaseDatabaseOperations):
# http://dev.mysql.com/doc/mysql/en/date-and-time-functions.html
return "EXTRACT(%s FROM %s)" % (lookup_type.upper(), field_name)
def date_trunc_sql(self, lookup_type, field_name):
fields = ['year', 'month', 'day', 'hour', 'minute', 'second']
format = ('%%Y-', '%%m', '-%%d', ' %%H:', '%%i', ':%%s') # Use double percents to escape.
format_def = ('0000-', '01', '-01', ' 00:', '00', ':00')
try:
i = fields.index(lookup_type) + 1
except ValueError:
sql = field_name
else:
format_str = ''.join([f for f in format[:i]] + [f for f in format_def[i:]])
sql = "CAST(DATE_FORMAT(%s, '%s') AS DATETIME)" % (field_name, format_str)
return sql
class DatabaseWrapper(BaseDatabaseWrapper):
ops = DatabaseOperations()
@ -139,20 +152,6 @@ dictfetchall = util.dictfetchall
def get_last_insert_id(cursor, table_name, pk_name):
return cursor.lastrowid
def get_date_trunc_sql(lookup_type, field_name):
# lookup_type is 'year', 'month', 'day'
fields = ['year', 'month', 'day', 'hour', 'minute', 'second']
format = ('%%Y-', '%%m', '-%%d', ' %%H:', '%%i', ':%%s') # Use double percents to escape.
format_def = ('0000-', '01', '-01', ' 00:', '00', ':00')
try:
i = fields.index(lookup_type) + 1
except ValueError:
sql = field_name
else:
format_str = ''.join([f for f in format[:i]] + [f for f in format_def[i:]])
sql = "CAST(DATE_FORMAT(%s, '%s') AS DATETIME)" % (field_name, format_str)
return sql
def get_datetime_cast_sql():
return None