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# -*- coding: utf-8 -*-
import time
import traceback
from contextlib import contextmanager
from django.conf import settings
from django.core.exceptions import ImproperlyConfigured
from django.db.backends import utils
from django_extensions.settings import DEFAULT_PRINT_SQL_TRUNCATE_CHARS
@contextmanager
def monkey_patch_cursordebugwrapper(
print_sql=None,
print_sql_location=False,
truncate=None,
logger=print,
confprefix="DJANGO_EXTENSIONS",
):
if not print_sql:
yield
else:
if truncate is None:
truncate = getattr(
settings,
"%s_PRINT_SQL_TRUNCATE" % confprefix,
DEFAULT_PRINT_SQL_TRUNCATE_CHARS,
)
sqlparse = None
if getattr(settings, "%s_SQLPARSE_ENABLED" % confprefix, True):
try:
import sqlparse
sqlparse_format_kwargs_defaults = dict(
reindent_aligned=True,
truncate_strings=500,
)
sqlparse_format_kwargs = getattr(
settings,
"%s_SQLPARSE_FORMAT_KWARGS" % confprefix,
sqlparse_format_kwargs_defaults,
)
except ImportError:
sqlparse = None
pygments = None
if getattr(settings, "%s_PYGMENTS_ENABLED" % confprefix, True):
try:
import pygments.lexers
import pygments.formatters
pygments_formatter = getattr(
settings,
"%s_PYGMENTS_FORMATTER" % confprefix,
pygments.formatters.TerminalFormatter,
)
pygments_formatter_kwargs = getattr(
settings, "%s_PYGMENTS_FORMATTER_KWARGS" % confprefix, {}
)
except ImportError:
pass
class PrintQueryWrapperMixin:
def execute(self, sql, params=()):
starttime = time.time()
try:
return utils.CursorWrapper.execute(self, sql, params)
finally:
execution_time = time.time() - starttime
raw_sql = self.db.ops.last_executed_query(self.cursor, sql, params)
if truncate:
raw_sql = raw_sql[:truncate]
if sqlparse:
raw_sql = sqlparse.format(raw_sql, **sqlparse_format_kwargs)
if pygments:
raw_sql = pygments.highlight(
raw_sql,
pygments.lexers.get_lexer_by_name("sql"),
pygments_formatter(**pygments_formatter_kwargs),
)
logger(raw_sql)
logger(
"Execution time: %.6fs [Database: %s]"
% (execution_time, self.db.alias)
)
if print_sql_location:
logger("Location of SQL Call:")
logger("".join(traceback.format_stack()))
_CursorDebugWrapper = utils.CursorDebugWrapper
class PrintCursorQueryWrapper(PrintQueryWrapperMixin, _CursorDebugWrapper):
pass
try:
from django.db import connections
_force_debug_cursor = {}
for connection_name in connections:
_force_debug_cursor[connection_name] = connections[
connection_name
].force_debug_cursor
except Exception:
connections = None
utils.CursorDebugWrapper = PrintCursorQueryWrapper
postgresql_base = None
try:
from django.db.backends.postgresql import base as postgresql_base
_PostgreSQLCursorDebugWrapper = postgresql_base.CursorDebugWrapper
class PostgreSQLPrintCursorDebugWrapper(
PrintQueryWrapperMixin, _PostgreSQLCursorDebugWrapper
):
pass
except (ImproperlyConfigured, TypeError):
postgresql_base = None
if postgresql_base:
postgresql_base.CursorDebugWrapper = PostgreSQLPrintCursorDebugWrapper
if connections:
for connection_name in connections:
connections[connection_name].force_debug_cursor = True
yield
utils.CursorDebugWrapper = _CursorDebugWrapper
if postgresql_base:
postgresql_base.CursorDebugWrapper = _PostgreSQLCursorDebugWrapper
if connections:
for connection_name in connections:
connections[connection_name].force_debug_cursor = _force_debug_cursor[
connection_name
]
|
