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This commit is contained in:
ladeng07
2022-05-06 15:45:57 +08:00
parent 12f390949b
commit 51552904f9
2347 changed files with 120102 additions and 53549 deletions
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venv/Lib/site-packages/django/db/migrations/questioner.py
+47 -67
View File
@@ -33,7 +33,7 @@ class MigrationQuestioner:
# file check will ensure we skip South ones.
try:
app_config = apps.get_app_config(app_label)
except LookupError: # It's a fake app.
except LookupError: # It's a fake app.
return self.defaults.get("ask_initial", False)
migrations_import_path, _ = MigrationLoader.migrations_module(app_config.label)
if migrations_import_path is None:
@@ -44,6 +44,7 @@ class MigrationQuestioner:
except ImportError:
return self.defaults.get("ask_initial", False)
else:
# getattr() needed on PY36 and older (replace with attribute access).
if getattr(migrations_module, "__file__", None):
filenames = os.listdir(os.path.dirname(migrations_module.__file__))
elif hasattr(migrations_module, "__path__"):
@@ -71,7 +72,7 @@ class MigrationQuestioner:
return self.defaults.get("ask_rename_model", False)
def ask_merge(self, app_label):
"""Should these migrations really be merged?"""
"""Do you really want to merge these migrations?"""
return self.defaults.get("ask_merge", False)
def ask_auto_now_add_addition(self, field_name, model_name):
@@ -81,6 +82,7 @@ class MigrationQuestioner:
class InteractiveMigrationQuestioner(MigrationQuestioner):
def _boolean_input(self, question, default=None):
result = input("%s " % question)
if not result and default is not None:
@@ -104,7 +106,7 @@ class InteractiveMigrationQuestioner(MigrationQuestioner):
return value
result = input("Please select a valid option: ")
def _ask_default(self, default=""):
def _ask_default(self, default=''):
"""
Prompt for a default value.
@@ -112,16 +114,13 @@ class InteractiveMigrationQuestioner(MigrationQuestioner):
string) which will be shown to the user and used as the return value
if the user doesn't provide any other input.
"""
print("Please enter the default value as valid Python.")
print("Please enter the default value now, as valid Python")
if default:
print(
f"Accept the default '{default}' by pressing 'Enter' or "
f"provide another value."
"You can accept the default '{}' by pressing 'Enter' or you "
"can provide another value.".format(default)
)
print(
"The datetime and django.utils.timezone modules are available, so "
"it is possible to provide e.g. timezone.now as a value."
)
print("The datetime and django.utils.timezone modules are available, so you can do e.g. timezone.now")
print("Type 'exit' to exit this prompt")
while True:
if default:
@@ -132,12 +131,12 @@ class InteractiveMigrationQuestioner(MigrationQuestioner):
if not code and default:
code = default
if not code:
print("Please enter some code, or 'exit' (without quotes) to exit.")
print("Please enter some code, or 'exit' (with no quotes) to exit.")
elif code == "exit":
sys.exit(1)
else:
try:
return eval(code, {}, {"datetime": datetime, "timezone": timezone})
return eval(code, {}, {'datetime': datetime, 'timezone': timezone})
except (SyntaxError, NameError) as e:
print("Invalid input: %s" % e)
@@ -145,18 +144,14 @@ class InteractiveMigrationQuestioner(MigrationQuestioner):
"""Adding a NOT NULL field to a model."""
if not self.dry_run:
choice = self._choice_input(
f"It is impossible to add a non-nullable field '{field_name}' "
f"to {model_name} without specifying a default. This is "
f"because the database needs something to populate existing "
f"rows.\n"
f"Please select a fix:",
"You are trying to add a non-nullable field '%s' to %s without a default; "
"we can't do that (the database needs something to populate existing rows).\n"
"Please select a fix:" % (field_name, model_name),
[
(
"Provide a one-off default now (will be set on all existing "
"rows with a null value for this column)"
),
"Quit and manually define a default value in models.py.",
],
("Provide a one-off default now (will be set on all existing "
"rows with a null value for this column)"),
"Quit, and let me add a default in models.py",
]
)
if choice == 2:
sys.exit(3)
@@ -168,21 +163,18 @@ class InteractiveMigrationQuestioner(MigrationQuestioner):
"""Changing a NULL field to NOT NULL."""
if not self.dry_run:
choice = self._choice_input(
f"It is impossible to change a nullable field '{field_name}' "
f"on {model_name} to non-nullable without providing a "
f"default. This is because the database needs something to "
f"populate existing rows.\n"
f"Please select a fix:",
"You are trying to change the nullable field '%s' on %s to non-nullable "
"without a default; we can't do that (the database needs something to "
"populate existing rows).\n"
"Please select a fix:" % (field_name, model_name),
[
(
"Provide a one-off default now (will be set on all existing "
"rows with a null value for this column)"
),
"Ignore for now. Existing rows that contain NULL values "
"will have to be handled manually, for example with a "
"RunPython or RunSQL operation.",
"Quit and manually define a default value in models.py.",
],
("Provide a one-off default now (will be set on all existing "
"rows with a null value for this column)"),
("Ignore for now, and let me handle existing rows with NULL myself "
"(e.g. because you added a RunPython or RunSQL operation to handle "
"NULL values in a previous data migration)"),
"Quit, and let me add a default in models.py",
]
)
if choice == 2:
return NOT_PROVIDED
@@ -194,33 +186,21 @@ class InteractiveMigrationQuestioner(MigrationQuestioner):
def ask_rename(self, model_name, old_name, new_name, field_instance):
"""Was this field really renamed?"""
msg = "Was %s.%s renamed to %s.%s (a %s)? [y/N]"
return self._boolean_input(
msg
% (
model_name,
old_name,
model_name,
new_name,
field_instance.__class__.__name__,
),
False,
)
msg = "Did you rename %s.%s to %s.%s (a %s)? [y/N]"
return self._boolean_input(msg % (model_name, old_name, model_name, new_name,
field_instance.__class__.__name__), False)
def ask_rename_model(self, old_model_state, new_model_state):
"""Was this model really renamed?"""
msg = "Was the model %s.%s renamed to %s? [y/N]"
return self._boolean_input(
msg
% (old_model_state.app_label, old_model_state.name, new_model_state.name),
False,
)
msg = "Did you rename the %s.%s model to %s? [y/N]"
return self._boolean_input(msg % (old_model_state.app_label, old_model_state.name,
new_model_state.name), False)
def ask_merge(self, app_label):
return self._boolean_input(
"\nMerging will only work if the operations printed above do not conflict\n"
+ "with each other (working on different fields or models)\n"
+ "Should these migration branches be merged? [y/N]",
"\nMerging will only work if the operations printed above do not conflict\n" +
"with each other (working on different fields or models)\n" +
"Do you want to merge these migration branches? [y/N]",
False,
)
@@ -228,24 +208,24 @@ class InteractiveMigrationQuestioner(MigrationQuestioner):
"""Adding an auto_now_add field to a model."""
if not self.dry_run:
choice = self._choice_input(
f"It is impossible to add the field '{field_name}' with "
f"'auto_now_add=True' to {model_name} without providing a "
f"default. This is because the database needs something to "
f"populate existing rows.\n",
"You are trying to add the field '{}' with 'auto_now_add=True' "
"to {} without a default; the database needs something to "
"populate existing rows.\n".format(field_name, model_name),
[
"Provide a one-off default now which will be set on all "
"existing rows",
"Quit and manually define a default value in models.py.",
],
"Provide a one-off default now (will be set on all "
"existing rows)",
"Quit, and let me add a default in models.py",
]
)
if choice == 2:
sys.exit(3)
else:
return self._ask_default(default="timezone.now")
return self._ask_default(default='timezone.now')
return None
class NonInteractiveMigrationQuestioner(MigrationQuestioner):
def ask_not_null_addition(self, field_name, model_name):
# We can't ask the user, so act like the user aborted.
sys.exit(3)