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from django.db import transaction
from django.db.backends.sqlite3.base import quote_name
def get_table_list(cursor):
cursor.execute("SELECT name FROM sqlite_master WHERE type='table' ORDER BY name")
return [row[0] for row in cursor.fetchall()]
def get_table_description(cursor, table_name):
cursor.execute("PRAGMA table_info(%s)" % quote_name(table_name))
return [(row[1], row[2], None, None) for row in cursor.fetchall()]
def get_relations(cursor, table_name):
raise NotImplementedError
def get_indexes(cursor, table_name):
raise NotImplementedError
# Maps SQL types to Django Field types. Some of the SQL types have multiple
# entries here because SQLite allows for anything and doesn't normalize the
# field type; it uses whatever was given.
BASE_DATA_TYPES_REVERSE = {
'bool': 'BooleanField',
'boolean': 'BooleanField',
'smallint': 'SmallIntegerField',
'smallinteger': 'SmallIntegerField',
'int': 'IntegerField',
'integer': 'IntegerField',
'text': 'TextField',
'char': 'CharField',
'date': 'DateField',
'datetime': 'DateTimeField',
'time': 'TimeField',
}
# This light wrapper "fakes" a dictionary interface, because some SQLite data
# types include variables in them -- e.g. "varchar(30)" -- and can't be matched
# as a simple dictionary lookup.
class FlexibleFieldLookupDict:
def __getitem__(self, key):
key = key.lower()
try:
return BASE_DATA_TYPES_REVERSE[key]
except KeyError:
import re
m = re.search(r'^\s*(?:var)?char\s*\(\s*(\d+)\s*\)\s*$', key)
if m:
return ('CharField', {'maxlength': int(m.group(1))})
raise KeyError
DATA_TYPES_REVERSE = FlexibleFieldLookupDict()
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