django1/django/core/management.py

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# Django management-related functions, including "CREATE TABLE" generation and
# development-server initialization.
import django
import os, re, sys
MODULE_TEMPLATE = ''' {%% if perms.%(app)s.%(addperm)s or perms.%(app)s.%(changeperm)s %%}
<tr>
<th>{%% if perms.%(app)s.%(changeperm)s %%}<a href="/%(app)s/%(mod)s/">{%% endif %%}%(name)s{%% if perms.%(app)s.%(changeperm)s %%}</a>{%% endif %%}</th>
<td class="x50">{%% if perms.%(app)s.%(addperm)s %%}<a href="/%(app)s/%(mod)s/add/" class="addlink">{%% endif %%}Add{%% if perms.%(app)s.%(addperm)s %%}</a>{%% endif %%}</td>
<td class="x75">{%% if perms.%(app)s.%(changeperm)s %%}<a href="/%(app)s/%(mod)s/" class="changelink">{%% endif %%}Change{%% if perms.%(app)s.%(changeperm)s %%}</a>{%% endif %%}</td>
</tr>
{%% endif %%}'''
APP_ARGS = '[app app ...]'
# Use django.__path__[0] because we don't know which directory django into
# which has been installed.
PROJECT_TEMPLATE_DIR = os.path.join(django.__path__[0], 'conf/%s_template')
ADMIN_TEMPLATE_DIR = os.path.join(django.__path__[0], 'conf/admin_templates')
def _get_packages_insert(app_label):
return "INSERT INTO packages (label, name) VALUES ('%s', '%s');" % (app_label, app_label)
def _get_permission_codename(action, opts):
return '%s_%s' % (action, opts.object_name.lower())
def _get_all_permissions(opts):
"Returns (codename, name) for all permissions in the given opts."
perms = []
if opts.admin:
for action in ('add', 'change', 'delete'):
perms.append((_get_permission_codename(action, opts), 'Can %s %s' % (action, opts.verbose_name)))
return perms + list(opts.permissions)
def _get_permission_insert(name, codename, opts):
return "INSERT INTO auth_permissions (name, package, codename) VALUES ('%s', '%s', '%s');" % \
(name.replace("'", "''"), opts.app_label, codename)
def _get_contenttype_insert(opts):
return "INSERT INTO content_types (name, package, python_module_name) VALUES ('%s', '%s', '%s');" % \
(opts.verbose_name, opts.app_label, opts.module_name)
def _is_valid_dir_name(s):
return bool(re.search(r'^\w+$', s))
def get_sql_create(mod):
"Returns a list of the CREATE TABLE SQL statements for the given module."
from django.core import db, meta
final_output = []
for klass in mod._MODELS:
opts = klass._meta
table_output = []
for f in opts.fields:
if isinstance(f, meta.ForeignKey):
rel_field = f.rel.get_related_field()
# If the foreign key points to an AutoField, the foreign key
# should be an IntegerField, not an AutoField. Otherwise, the
# foreign key should be the same type of field as the field
# to which it points.
if rel_field.__class__.__name__ == 'AutoField':
data_type = 'IntegerField'
else:
data_type = rel_field.__class__.__name__
else:
rel_field = f
data_type = f.__class__.__name__
col_type = db.DATA_TYPES[data_type]
if col_type is not None:
field_output = [f.name, col_type % rel_field.__dict__]
field_output.append('%sNULL' % (not f.null and 'NOT ' or ''))
if f.unique:
field_output.append('UNIQUE')
if f.primary_key:
field_output.append('PRIMARY KEY')
if f.rel:
field_output.append('REFERENCES %s (%s)' % \
(f.rel.to.db_table, f.rel.to.get_field(f.rel.field_name).name))
table_output.append(' '.join(field_output))
if opts.order_with_respect_to:
table_output.append('_order %s NULL' % db.DATA_TYPES['IntegerField'])
for field_constraints in opts.unique_together:
table_output.append('UNIQUE (%s)' % ", ".join(field_constraints))
full_statement = ['CREATE TABLE %s (' % opts.db_table]
for i, line in enumerate(table_output): # Combine and add commas.
full_statement.append(' %s%s' % (line, i < len(table_output)-1 and ',' or ''))
full_statement.append(');')
final_output.append('\n'.join(full_statement))
for klass in mod._MODELS:
opts = klass._meta
for f in opts.many_to_many:
table_output = ['CREATE TABLE %s (' % f.get_m2m_db_table(opts)]
table_output.append(' id %s NOT NULL PRIMARY KEY,' % db.DATA_TYPES['AutoField'])
table_output.append(' %s_id %s NOT NULL REFERENCES %s (%s),' % \
(opts.object_name.lower(), db.DATA_TYPES['IntegerField'], opts.db_table, opts.pk.name))
table_output.append(' %s_id %s NOT NULL REFERENCES %s (%s),' % \
(f.rel.to.object_name.lower(), db.DATA_TYPES['IntegerField'], f.rel.to.db_table, f.rel.to.pk.name))
table_output.append(' UNIQUE (%s_id, %s_id)' % (opts.object_name.lower(), f.rel.to.object_name.lower()))
table_output.append(');')
final_output.append('\n'.join(table_output))
return final_output
get_sql_create.help_doc = "Prints the CREATE TABLE SQL statements for the given app(s)."
get_sql_create.args = APP_ARGS
def get_sql_delete(mod):
"Returns a list of the DROP TABLE SQL statements for the given module."
from django.core import db
try:
cursor = db.db.cursor()
except:
cursor = None
output = []
for klass in mod._MODELS:
try:
if cursor is not None:
# Check whether the table exists.
cursor.execute("SELECT 1 FROM %s LIMIT 1" % klass._meta.db_table)
except:
# The table doesn't exist, so it doesn't need to be dropped.
db.db.rollback()
else:
output.append("DROP TABLE %s;" % klass._meta.db_table)
for klass in mod._MODELS:
opts = klass._meta
for f in opts.many_to_many:
try:
if cursor is not None:
cursor.execute("SELECT 1 FROM %s LIMIT 1" % f.get_m2m_db_table(opts))
except:
db.db.rollback()
else:
output.append("DROP TABLE %s;" % f.get_m2m_db_table(opts))
app_label = mod._MODELS[0]._meta.app_label
# Delete from packages, auth_permissions, content_types.
output.append("DELETE FROM packages WHERE label = '%s';" % app_label)
output.append("DELETE FROM auth_permissions WHERE package = '%s';" % app_label)
output.append("DELETE FROM content_types WHERE package = '%s';" % app_label)
# Delete from the admin log.
if cursor is not None:
cursor.execute("SELECT id FROM content_types WHERE package = %s", [app_label])
for row in cursor.fetchall():
output.append("DELETE FROM auth_admin_log WHERE content_type_id = %s;" % row[0])
return output[::-1] # Reverse it, to deal with table dependencies.
get_sql_delete.help_doc = "Prints the DROP TABLE SQL statements for the given app(s)."
get_sql_delete.args = APP_ARGS
def get_sql_reset(mod):
"Returns a list of the DROP TABLE SQL, then the CREATE TABLE SQL, for the given module."
return get_sql_delete(mod) + get_sql_all(mod)
get_sql_reset.help_doc = "Prints the DROP TABLE SQL, then the CREATE TABLE SQL, for the given app(s)."
get_sql_reset.args = APP_ARGS
def get_sql_initial_data(mod):
"Returns a list of the initial INSERT SQL statements for the given module."
output = []
app_label = mod._MODELS[0]._meta.app_label
output.append(_get_packages_insert(app_label))
app_dir = os.path.normpath(os.path.join(os.path.dirname(mod.__file__), '../sql'))
for klass in mod._MODELS:
opts = klass._meta
# Add custom SQL, if it's available.
sql_file_name = os.path.join(app_dir, opts.module_name + '.sql')
if os.path.exists(sql_file_name):
fp = open(sql_file_name, 'r')
output.append(fp.read())
fp.close()
# Content types.
output.append(_get_contenttype_insert(opts))
# Permissions.
for codename, name in _get_all_permissions(opts):
output.append(_get_permission_insert(name, codename, opts))
return output
get_sql_initial_data.help_doc = "Prints the initial INSERT SQL statements for the given app(s)."
get_sql_initial_data.args = APP_ARGS
def get_sql_sequence_reset(mod):
"Returns a list of the SQL statements to reset PostgreSQL sequences for the given module."
from django.core import meta
output = []
for klass in mod._MODELS:
for f in klass._meta.fields:
if isinstance(f, meta.AutoField):
output.append("SELECT setval('%s_%s_seq', (SELECT max(%s) FROM %s));" % (klass._meta.db_table, f.name, f.name, klass._meta.db_table))
return output
get_sql_sequence_reset.help_doc = "Prints the SQL statements for resetting PostgreSQL sequences for the given app(s)."
get_sql_sequence_reset.args = APP_ARGS
def get_sql_indexes(mod):
"Returns a list of the CREATE INDEX SQL statements for the given module."
output = []
for klass in mod._MODELS:
for f in klass._meta.fields:
if f.db_index:
unique = f.unique and "UNIQUE " or ""
output.append("CREATE %sINDEX %s_%s ON %s (%s);" % \
(unique, klass._meta.db_table, f.name, klass._meta.db_table, f.name))
return output
get_sql_indexes.help_doc = "Prints the CREATE INDEX SQL statements for the given app(s)."
get_sql_indexes.args = APP_ARGS
def get_sql_all(mod):
"Returns a list of CREATE TABLE SQL and initial-data insert for the given module."
return get_sql_create(mod) + get_sql_initial_data(mod)
get_sql_all.help_doc = "Prints the CREATE TABLE and initial-data SQL statements for the given app(s)."
get_sql_all.args = APP_ARGS
def database_check(mod):
"Checks that everything is properly installed in the database for the given module."
from django.core import db
cursor = db.db.cursor()
app_label = mod._MODELS[0]._meta.app_label
# Check that the package exists in the database.
cursor.execute("SELECT 1 FROM packages WHERE label = %s", [app_label])
if cursor.rowcount < 1:
# sys.stderr.write("The '%s' package isn't installed.\n" % app_label)
print _get_packages_insert(app_label)
# Check that the permissions and content types are in the database.
perms_seen = {}
contenttypes_seen = {}
for klass in mod._MODELS:
opts = klass._meta
perms = _get_all_permissions(opts)
perms_seen.update(dict(perms))
contenttypes_seen[opts.module_name] = 1
for codename, name in perms:
cursor.execute("SELECT 1 FROM auth_permissions WHERE package = %s AND codename = %s", (app_label, codename))
if cursor.rowcount < 1:
# sys.stderr.write("The '%s.%s' permission doesn't exist.\n" % (app_label, codename))
print _get_permission_insert(name, codename, opts)
cursor.execute("SELECT 1 FROM content_types WHERE package = %s AND python_module_name = %s", (app_label, opts.module_name))
if cursor.rowcount < 1:
# sys.stderr.write("The '%s.%s' content type doesn't exist.\n" % (app_label, opts.module_name))
print _get_contenttype_insert(opts)
# Check that there aren't any *extra* permissions in the DB that the model
# doesn't know about.
cursor.execute("SELECT codename FROM auth_permissions WHERE package = %s", (app_label,))
for row in cursor.fetchall():
try:
perms_seen[row[0]]
except KeyError:
# sys.stderr.write("A permission called '%s.%s' was found in the database but not in the model.\n" % (app_label, row[0]))
print "DELETE FROM auth_permissions WHERE package='%s' AND codename = '%s';" % (app_label, row[0])
# Check that there aren't any *extra* content types in the DB that the
# model doesn't know about.
cursor.execute("SELECT python_module_name FROM content_types WHERE package = %s", (app_label,))
for row in cursor.fetchall():
try:
contenttypes_seen[row[0]]
except KeyError:
# sys.stderr.write("A content type called '%s.%s' was found in the database but not in the model.\n" % (app_label, row[0]))
print "DELETE FROM content_types WHERE package='%s' AND python_module_name = '%s';" % (app_label, row[0])
database_check.help_doc = "Checks that everything is installed in the database for the given app(s) and prints SQL statements if needed."
database_check.args = APP_ARGS
def get_admin_index(mod):
"Returns admin-index template snippet (in list form) for the given module."
from django.utils.text import capfirst
output = []
app_label = mod._MODELS[0]._meta.app_label
output.append('{%% if perms.%s %%}' % app_label)
output.append('<div class="module"><h2>%s</h2><table>' % app_label.title())
for klass in mod._MODELS:
if klass._meta.admin:
output.append(MODULE_TEMPLATE % {
'app': app_label,
'mod': klass._meta.module_name,
'name': capfirst(klass._meta.verbose_name_plural),
'addperm': klass._meta.get_add_permission(),
'changeperm': klass._meta.get_change_permission(),
})
output.append('</table></div>')
output.append('{% endif %}')
return output
get_admin_index.help_doc = "Prints the admin-index template snippet for the given app(s)."
get_admin_index.args = APP_ARGS
def init():
"Initializes the database with auth and core."
from django.core import db, meta
auth = meta.get_app('auth')
core = meta.get_app('core')
try:
cursor = db.db.cursor()
for sql in get_sql_create(core) + get_sql_create(auth) + get_sql_initial_data(core) + get_sql_initial_data(auth):
cursor.execute(sql)
cursor.execute("INSERT INTO %s (domain, name) VALUES ('mysite.com', 'My Django site')" % core.Site._meta.db_table)
except Exception, e:
sys.stderr.write("Error: The database couldn't be initialized. Here's the full exception:\n%s\n" % e)
db.db.rollback()
sys.exit(1)
db.db.commit()
init.args = ''
def install(mod):
"Executes the equivalent of 'get_sql_all' in the current database."
from django.core import db
sql_list = get_sql_all(mod)
try:
cursor = db.db.cursor()
for sql in sql_list:
cursor.execute(sql)
except Exception, e:
mod_name = mod.__name__[mod.__name__.rindex('.')+1:]
sys.stderr.write("""Error: %s couldn't be installed. Possible reasons:
* The database isn't running or isn't configured correctly.
* At least one of the database tables already exists.
* The SQL was invalid.
Hint: Look at the output of 'django-admin.py sqlall %s'. That's the SQL this command wasn't able to run.
The full error: %s\n""" % \
(mod_name, mod_name, e))
db.db.rollback()
sys.exit(1)
db.db.commit()
install.args = APP_ARGS
def _start_helper(app_or_project, name, directory, other_name=''):
other = {'project': 'app', 'app': 'project'}[app_or_project]
if not _is_valid_dir_name(name):
sys.stderr.write("Error: %r is not a valid %s name. Please use only numbers, letters and underscores.\n" % (name, app_or_project))
sys.exit(1)
top_dir = os.path.join(directory, name)
try:
os.mkdir(top_dir)
except OSError, e:
sys.stderr.write("Error: %s\n" % e)
sys.exit(1)
template_dir = PROJECT_TEMPLATE_DIR % app_or_project
for d, subdirs, files in os.walk(template_dir):
relative_dir = d[len(template_dir)+1:].replace('%s_name' % app_or_project, name)
if relative_dir:
os.mkdir(os.path.join(top_dir, relative_dir))
for i, subdir in enumerate(subdirs):
if subdir.startswith('.'):
del subdirs[i]
for f in files:
if f.endswith('.pyc'):
continue
fp_old = open(os.path.join(d, f), 'r')
fp_new = open(os.path.join(top_dir, relative_dir, f.replace('%s_name' % app_or_project, name)), 'w')
fp_new.write(fp_old.read().replace('{{ %s_name }}' % app_or_project, name).replace('{{ %s_name }}' % other, other_name))
fp_old.close()
fp_new.close()
def startproject(project_name, directory):
"Creates a Django project for the given project_name in the given directory."
from random import choice
_start_helper('project', project_name, directory)
# Populate TEMPLATE_DIRS for the admin templates, based on where Django is
# installed.
admin_settings_file = os.path.join(directory, project_name, 'settings/admin.py')
settings_contents = open(admin_settings_file, 'r').read()
fp = open(admin_settings_file, 'w')
settings_contents = re.sub(r'(?s)\b(TEMPLATE_DIRS\s*=\s*\()(.*?)\)', "\\1\n '%s',\\2)" % ADMIN_TEMPLATE_DIR, settings_contents)
fp.write(settings_contents)
fp.close()
# Create a random SECRET_KEY hash, and put it in the main settings.
main_settings_file = os.path.join(directory, project_name, 'settings/main.py')
settings_contents = open(main_settings_file, 'r').read()
fp = open(main_settings_file, 'w')
secret_key = ''.join([choice('abcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*(-_=+)') for i in range(50)])
settings_contents = re.sub(r"(?<=SECRET_KEY = ')'", secret_key + "'", settings_contents)
fp.write(settings_contents)
fp.close()
startproject.help_doc = "Creates a Django project directory structure for the given project name in the current directory."
startproject.args = "[projectname]"
def startapp(app_name, directory):
"Creates a Django app for the given project_name in the given directory."
# Determine the project_name a bit naively -- by looking at the name of
# the parent directory.
project_dir = os.path.normpath(os.path.join(directory, '../'))
project_name = os.path.basename(project_dir)
_start_helper('app', app_name, directory, project_name)
startapp.help_doc = "Creates a Django app directory structure for the given app name in the current directory."
startapp.args = "[appname]"
def createsuperuser():
"Creates a superuser account."
from django.core import validators
from django.models.auth import users
import getpass
try:
while 1:
username = raw_input('Username (only letters, digits and underscores): ')
if not username.isalnum():
sys.stderr.write("Error: That username is invalid.\n")
continue
try:
users.get_object(username__exact=username)
except users.UserDoesNotExist:
break
else:
sys.stderr.write("Error: That username is already taken.\n")
while 1:
email = raw_input('E-mail address: ')
try:
validators.isValidEmail(email, None)
except validators.ValidationError:
sys.stderr.write("Error: That e-mail address is invalid.\n")
else:
break
while 1:
password = getpass.getpass()
password2 = getpass.getpass('Password (again): ')
if password != password2:
sys.stderr.write("Error: Your passwords didn't match.\n")
continue
if password.strip() == '':
sys.stderr.write("Error: Blank passwords aren't allowed.\n")
continue
break
except KeyboardInterrupt:
sys.stderr.write("\nOperation cancelled.\n")
sys.exit(1)
u = users.create_user(username, email, password)
u.is_staff = True
u.is_active = True
u.is_superuser = True
u.save()
print "User created successfully."
createsuperuser.args = ''
def inspectdb(db_name):
"Generator that introspects the tables in the given database name and returns a Django model, one line at a time."
from django.core import db
from django.conf import settings
settings.DATABASE_NAME = db_name
cursor = db.db.cursor()
yield 'from django.core import meta'
yield ''
for table_name in db.get_table_list(cursor):
object_name = table_name.title().replace('_', '')
object_name = object_name.endswith('s') and object_name[:-1] or object_name
yield 'class %s(meta.Model):' % object_name
yield ' db_table = %r' % table_name
yield ' fields = ('
cursor.execute("SELECT * FROM %s LIMIT 1" % table_name)
for row in cursor.description:
field_type = db.DATA_TYPES_REVERSE[row[1]]
field_desc = 'meta.%s(%r' % (field_type, row[0])
if field_type == 'CharField':
field_desc += ', maxlength=%s' % (row[3])
yield ' %s),' % field_desc
yield ' )'
yield ''
inspectdb.help_doc = "Introspects the database tables in the given database and outputs a Django model module."
inspectdb.args = "[dbname]"
def runserver(port):
"Starts a lightweight Web server for development."
from django.core.servers.basehttp import run, WSGIServerException
from django.core.handlers.wsgi import AdminMediaHandler, WSGIHandler
if not port.isdigit():
sys.stderr.write("Error: %r is not a valid port number.\n" % port)
sys.exit(1)
def inner_run():
from django.conf.settings import SETTINGS_MODULE
print "Starting server on port %s with settings module %r." % (port, SETTINGS_MODULE)
print "Go to http://127.0.0.1:%s/ for Django." % port
print "Quit the server with CONTROL-C (Unix) or CTRL-BREAK (Windows)."
try:
run(int(port), AdminMediaHandler(WSGIHandler()))
except WSGIServerException, e:
# Use helpful error messages instead of ugly tracebacks.
ERRORS = {
13: "You don't have permission to access that port.",
98: "That port is already in use.",
}
try:
error_text = ERRORS[e.args[0].args[0]]
except (AttributeError, KeyError):
error_text = str(e)
sys.stderr.write("Error: %s\n" % error_text)
sys.exit(1)
except KeyboardInterrupt:
sys.exit(0)
from django.utils import autoreload
autoreload.main(inner_run)
runserver.args = '[optional port number]'