Source code for sqlobject.manager.command

#!/usr/bin/env python
from __future__ import print_function

import fnmatch
import optparse
import os
import re
import sys
import textwrap
import time
import warnings

    from paste.deploy import appconfig
except ImportError:
    appconfig = None

import sqlobject
from sqlobject import col
from sqlobject.classregistry import findClass
from sqlobject.declarative import DeclarativeMeta
from sqlobject.util import moduleloader
from sqlobject.compat import PY2, with_metaclass, string_type

# It's not very unsafe to use tempnam like we are doing:
    'ignore', 'tempnam is a potential security risk.*',
    RuntimeWarning, '.*command', 28)

if PY2:
    # noqa for flake8 and python 3
    input = raw_input  # noqa

[docs]def nowarning_tempnam(*args, **kw): return os.tempnam(*args, **kw)
[docs]class SQLObjectVersionTable(sqlobject.SQLObject): """ This table is used to store information about the database and its version (used with record and update commands). """ class sqlmeta: table = 'sqlobject_db_version' version = col.StringCol() updated = col.DateTimeCol(
[docs]def db_differences(soClass, conn): """ Returns the differences between a class and the table in a connection. Returns [] if no differences are found. This function does the best it can; it can miss many differences. """ # @@: Repeats a lot from CommandStatus.command, but it's hard # to actually factor out the display logic. Or I'm too lazy # to do so. diffs = [] if not conn.tableExists(soClass.sqlmeta.table): if soClass.sqlmeta.columns: diffs.append('Does not exist in database') else: try: columns = conn.columnsFromSchema(soClass.sqlmeta.table, soClass) except AttributeError: # Database does not support reading columns pass else: existing = {} for _col in columns: _col = _col.withClass(soClass) existing[_col.dbName] = _col missing = {} for _col in soClass.sqlmeta.columnList: if _col.dbName in existing: del existing[_col.dbName] else: missing[_col.dbName] = _col for _col in existing.values(): diffs.append('Database has extra column: %s' % _col.dbName) for _col in missing.values(): diffs.append('Database missing column: %s' % _col.dbName) return diffs
[docs]class CommandRunner(object): def __init__(self): self.commands = {} self.command_aliases = {}
[docs] def run(self, argv): invoked_as = argv[0] args = argv[1:] for i in range(len(args)): if not args[i].startswith('-'): # this must be a command command = args[i].lower() del args[i] break else: # no command found self.invalid('No COMMAND given (try "%s help")' % os.path.basename(invoked_as)) real_command = self.command_aliases.get(command, command) if real_command not in self.commands.keys(): self.invalid('COMMAND %s unknown' % command) runner = self.commands[real_command]( invoked_as, command, args, self)
[docs] def register(self, command): name = self.commands[name] = command for alias in command.aliases: self.command_aliases[alias] = name
[docs] def invalid(self, msg, code=2): print(msg) sys.exit(code)
the_runner = CommandRunner() register = the_runner.register
[docs]def standard_parser(connection=True, simulate=True, interactive=False, find_modules=True): parser = optparse.OptionParser() parser.add_option('-v', '--verbose', help='Be verbose (multiple times for more verbosity)', action='count', dest='verbose', default=0) if simulate: parser.add_option('-n', '--simulate', help="Don't actually do anything (implies -v)", action='store_true', dest='simulate') if connection: parser.add_option('-c', '--connection', help="The database connection URI", metavar='URI', dest='connection_uri') parser.add_option('-f', '--config-file', help="The Paste config file " "that contains the database URI (in the database key)", metavar="FILE", dest="config_file") if find_modules: parser.add_option('-m', '--module', help="Module in which to find SQLObject classes", action='append', metavar='MODULE', dest='modules', default=[]) parser.add_option('-p', '--package', help="Package to search for SQLObject classes", action="append", metavar="PACKAGE", dest="packages", default=[]) parser.add_option('--class', help="Select only named classes (wildcards allowed)", action="append", metavar="NAME", dest="class_matchers", default=[]) if interactive: parser.add_option('-i', '--interactive', help="Ask before doing anything " "(use twice to be more careful)", action="count", dest="interactive", default=0) parser.add_option('--egg', help="Select modules from the given Egg, " "using sqlobject.txt", action="append", metavar="EGG_SPEC", dest="eggs", default=[]) return parser
[docs]class Command(with_metaclass(DeclarativeMeta, object)): min_args = 0 min_args_error = 'You must provide at least %(min_args)s arguments' max_args = 0 max_args_error = 'You must provide no more than %(max_args)s arguments' aliases = () required_args = [] description = None help = ''
[docs] def orderClassesByDependencyLevel(self, classes): """ Return classes ordered by their depth in the class dependency tree (this is *not* the inheritance tree), from the top level (independant) classes to the deepest level. The dependency tree is defined by the foreign key relations. """ # @@: written as a self-contained function for now, to prevent # having to modify any core SQLObject component and namespace # contamination. # yemartin - 2006-08-08 class SQLObjectCircularReferenceError(Exception): pass def findReverseDependencies(cls): """ Return a list of classes that cls depends on. Note that "depends on" here mean "has a foreign key pointing to". """ depended = [] for _col in cls.sqlmeta.columnList: if _col.foreignKey: other = findClass(_col.foreignKey, _col.soClass.sqlmeta.registry) if (other is not cls) and (other not in depended): depended.append(other) return depended # Cache to save already calculated dependency levels. dependency_levels = {} def calculateDependencyLevel(cls, dependency_stack=[]): """ Recursively calculate the dependency level of cls, while using the dependency_stack to detect any circular reference. """ # Return value from the cache if already calculated if cls in dependency_levels: return dependency_levels[cls] # Check for circular references if cls in dependency_stack: dependency_stack.append(cls) raise SQLObjectCircularReferenceError( "Found a circular reference: %s " % (' --> '.join([x.__name__ for x in dependency_stack]))) dependency_stack.append(cls) # Recursively inspect dependent classes. depended = findReverseDependencies(cls) if depended: level = max([calculateDependencyLevel(x, dependency_stack) for x in depended]) + 1 else: level = 0 dependency_levels[cls] = level return level # Now simply calculate and sort by dependency levels: try: sorter = [] for cls in classes: level = calculateDependencyLevel(cls) sorter.append((level, cls)) sorter.sort(key=lambda x: x[0]) ordered_classes = [cls for _, cls in sorter] except SQLObjectCircularReferenceError as msg: # Failsafe: return the classes as-is if a circular reference # prevented the dependency levels to be calculated. print("Warning: a circular reference was detected in the " "model. Unable to sort the classes by dependency: they " "will be treated in alphabetic order. This may or may " "not work depending on your database backend. " "The error was:\n%s" % msg) return classes return ordered_classes
def __classinit__(cls, new_args): if cls.__bases__ == (object,): # This abstract base class return register(cls) def __init__(self, invoked_as, command_name, args, runner): self.invoked_as = invoked_as self.command_name = command_name self.raw_args = args self.runner = runner
[docs] def run(self): self.parser.usage = "%%prog [options]\n%s" % self.summary if help = textwrap.fill(, int(os.environ.get('COLUMNS', 80)) - 4) self.parser.usage += '\n' + help self.parser.prog = '%s %s' % ( os.path.basename(self.invoked_as), self.command_name) if self.description: self.parser.description = self.description self.options, self.args = self.parser.parse_args(self.raw_args) if (getattr(self.options, 'simulate', False) and not self.options.verbose): self.options.verbose = 1 if self.min_args is not None and len(self.args) < self.min_args: self.runner.invalid( self.min_args_error % {'min_args': self.min_args, 'actual_args': len(self.args)}) if self.max_args is not None and len(self.args) > self.max_args: self.runner.invalid( self.max_args_error % {'max_args': self.max_args, 'actual_args': len(self.args)}) for var_name, option_name in self.required_args: if not getattr(self.options, var_name, None): self.runner.invalid( 'You must provide the option %s' % option_name) conf = self.config() if conf and conf.get('sys_path'): update_sys_path(conf['sys_path'], self.options.verbose) if conf and conf.get('database'): conn = sqlobject.connectionForURI(conf['database']) sqlobject.sqlhub.processConnection = conn for egg_spec in getattr(self.options, 'eggs', []): self.load_options_from_egg(egg_spec) self.command()
[docs] def classes(self, require_connection=True, require_some=False): all = [] for module_name in self.options.modules: all.extend(self.classes_from_module( moduleloader.load_module(module_name))) for package_name in self.options.packages: all.extend(self.classes_from_package(package_name)) for egg_spec in self.options.eggs: all.extend(self.classes_from_egg(egg_spec)) if self.options.class_matchers: filtered = [] for soClass in all: name = soClass.__name__ for matcher in self.options.class_matchers: if fnmatch.fnmatch(name, matcher): filtered.append(soClass) break all = filtered conn = self.connection() if conn: for soClass in all: soClass._connection = conn else: missing = [] for soClass in all: try: if not soClass._connection: missing.append(soClass) except AttributeError: missing.append(soClass) if missing and require_connection: self.runner.invalid( 'These classes do not have connections set:\n * %s\n' 'You must indicate --connection=URI' % '\n * '.join([soClass.__name__ for soClass in missing])) if require_some and not all: print('No classes found!') if self.options.modules: print('Looked in modules: %s' % ', '.join(self.options.modules)) else: print('No modules specified') if self.options.packages: print('Looked in packages: %s' % ', '.join(self.options.packages)) else: print('No packages specified') if self.options.class_matchers: print('Matching class pattern: %s' % self.options.class_matches) if self.options.eggs: print('Looked in eggs: %s' % ', '.join(self.options.eggs)) else: print('No eggs specified') sys.exit(1) return self.orderClassesByDependencyLevel(all)
[docs] def classes_from_module(self, module): all = [] if hasattr(module, 'soClasses'): for name_or_class in module.soClasses: if isinstance(name_or_class, str): name_or_class = getattr(module, name_or_class) all.append(name_or_class) else: for name in dir(module): value = getattr(module, name) if (isinstance(value, type) and issubclass(value, sqlobject.SQLObject) and value.__module__ == module.__name__): all.append(value) return all
[docs] def connection(self): config = self.config() if config is not None: assert config.get('database'), ( "No database variable found in config file %s" % self.options.config_file) return sqlobject.connectionForURI(config['database']) elif getattr(self.options, 'connection_uri', None): return sqlobject.connectionForURI(self.options.connection_uri) else: return None
[docs] def config(self): if not getattr(self.options, 'config_file', None): return None config_file = self.options.config_file if appconfig: if (not config_file.startswith('egg:') and not config_file.startswith('config:')): config_file = 'config:' + config_file return appconfig(config_file, relative_to=os.getcwd()) else: return self.ini_config(config_file)
[docs] def ini_config(self, conf_fn): conf_section = 'main' if '#' in conf_fn: conf_fn, conf_section = conf_fn.split('#', 1) try: from ConfigParser import ConfigParser except ImportError: from configparser import ConfigParser p = ConfigParser() # Case-sensitive: p.optionxform = str if not os.path.exists(conf_fn): # Stupid RawConfigParser doesn't give an error for # non-existant files: raise OSError( "Config file %s does not exist" % self.options.config_file)[conf_fn]) p._defaults.setdefault( 'here', os.path.dirname(os.path.abspath(conf_fn))) possible_sections = [] for section in p.sections(): name = section.strip().lower() if (conf_section == name or (conf_section == name.split(':')[-1] and name.split(':')[0] in ('app', 'application'))): possible_sections.append(section) if not possible_sections: raise OSError( "Config file %s does not have a section [%s] or [*:%s]" % (conf_fn, conf_section, conf_section)) if len(possible_sections) > 1: raise OSError( "Config file %s has multiple sections matching %s: %s" % (conf_fn, conf_section, ', '.join(possible_sections))) config = {} for op in p.options(possible_sections[0]): config[op] = p.get(possible_sections[0], op) return config
[docs] def classes_from_package(self, package_name): all = [] package = moduleloader.load_module(package_name) package_dir = os.path.dirname(package.__file__) def find_classes_in_file(arg, dir_name, filenames): if dir_name.startswith('.svn'): return filenames = filter( lambda fname: fname.endswith('.py') and fname != '', filenames) for fname in filenames: module_name = os.path.join(dir_name, fname) module_name = module_name[module_name.find(package_name):] module_name = module_name.replace(os.path.sep, '.')[:-3] try: module = moduleloader.load_module(module_name) except ImportError as err: if self.options.verbose: print('Could not import module "%s". ' 'Error was : "%s"' % (module_name, err)) continue except Exception as exc: if self.options.verbose: print('Unknown exception while processing module ' '"%s" : "%s"' % (module_name, exc)) continue classes = self.classes_from_module(module) all.extend(classes) for dirpath, dirnames, filenames in os.walk(package_dir): find_classes_in_file(None, dirpath, dirnames + filenames) return all
[docs] def classes_from_egg(self, egg_spec): modules = [] dist, conf = self.config_from_egg(egg_spec, warn_no_sqlobject=True) for mod in conf.get('db_module', '').split(','): mod = mod.strip() if not mod: continue if self.options.verbose: print('Looking in module %s' % mod) modules.extend(self.classes_from_module( moduleloader.load_module(mod))) return modules
[docs] def load_options_from_egg(self, egg_spec): dist, conf = self.config_from_egg(egg_spec) if (hasattr(self.options, 'output_dir') and not self.options.output_dir and conf.get('history_dir')): dir = conf['history_dir'] dir = dir.replace('$base', dist.location) self.options.output_dir = dir
[docs] def config_from_egg(self, egg_spec, warn_no_sqlobject=True): import pkg_resources dist = pkg_resources.get_distribution(egg_spec) if not dist.has_metadata('sqlobject.txt'): if warn_no_sqlobject: print('No sqlobject.txt in %s egg info' % egg_spec) return None, {} result = {} for line in dist.get_metadata_lines('sqlobject.txt'): line = line.strip() if not line or line.startswith('#'): continue name, value = line.split('=', 1) name = name.strip().lower() if name in result: print('Warning: %s appears more than once ' 'in sqlobject.txt' % name) result[name.strip().lower()] = value.strip() return dist, result
[docs] def command(self): raise NotImplementedError
def _get_prog_name(self): return os.path.basename(self.invoked_as) prog_name = property(_get_prog_name)
[docs] def ask(self, prompt, safe=False, default=True): if self.options.interactive >= 2: default = safe if default: prompt += ' [Y/n]? ' else: prompt += ' [y/N]? ' while 1: response = input(prompt).strip() if not response.strip(): return default if response and response[0].lower() in ('y', 'n'): return response[0].lower() == 'y' print('Y or N please')
[docs] def shorten_filename(self, fn): """ Shortens a filename to make it relative to the current directory (if it can). For display purposes. """ if fn.startswith(os.getcwd() + '/'): fn = fn[len(os.getcwd()) + 1:] return fn
[docs] def open_editor(self, pretext, breaker=None, extension='.txt'): """ Open an editor with the given text. Return the new text, or None if no edits were made. If given, everything after `breaker` will be ignored. """ fn = nowarning_tempnam() + extension f = open(fn, 'w') f.write(pretext) f.close() print('$EDITOR %s' % fn) os.system('$EDITOR %s' % fn) f = open(fn, 'r') content = f.close() if breaker: content = content.split(breaker)[0] pretext = pretext.split(breaker)[0] if content == pretext or not content.strip(): return None return content
[docs]class CommandSQL(Command): name = 'sql' summary = 'Show SQL CREATE statements' parser = standard_parser(simulate=False)
[docs] def command(self): classes = self.classes() allConstraints = [] for cls in classes: if self.options.verbose >= 1: print('-- %s from %s' % ( cls.__name__, cls.__module__)) createSql, constraints = cls.createTableSQL() print(createSql.strip() + ';\n') allConstraints.append(constraints) for constraints in allConstraints: if constraints: for constraint in constraints: if constraint: print(constraint.strip() + ';\n')
[docs]class CommandList(Command): name = 'list' summary = 'Show all SQLObject classes found' parser = standard_parser(simulate=False, connection=False)
[docs] def command(self): if self.options.verbose >= 1: print('Classes found:') classes = self.classes(require_connection=False) for soClass in classes: print('%s.%s' % (soClass.__module__, soClass.__name__)) if self.options.verbose >= 1: print(' Table: %s' % soClass.sqlmeta.table)
[docs]class CommandCreate(Command): name = 'create' summary = 'Create tables' parser = standard_parser(interactive=True) parser.add_option('--create-db', action='store_true', dest='create_db', help="Create the database")
[docs] def command(self): v = self.options.verbose created = 0 existing = 0 dbs_created = [] constraints = {} for soClass in self.classes(require_some=True): if (self.options.create_db and soClass._connection not in dbs_created): if not self.options.simulate: try: soClass._connection.createEmptyDatabase() except soClass._connection.module.ProgrammingError as e: if str(e).find('already exists') != -1: print('Database already exists') else: raise else: print('(simulating; cannot create database)') dbs_created.append(soClass._connection) if soClass._connection not in constraints.keys(): constraints[soClass._connection] = [] exists = soClass._connection.tableExists(soClass.sqlmeta.table) if v >= 1: if exists: existing += 1 print('%s already exists.' % soClass.__name__) else: print('Creating %s' % soClass.__name__) if v >= 2: sql, extra = soClass.createTableSQL() print(sql) if (not self.options.simulate and not exists): if self.options.interactive: if self.ask('Create %s' % soClass.__name__): created += 1 tableConstraints = soClass.createTable( applyConstraints=False) if tableConstraints: constraints[soClass._connection].append( tableConstraints) else: print('Cancelled') else: created += 1 tableConstraints = soClass.createTable( applyConstraints=False) if tableConstraints: constraints[soClass._connection].append( tableConstraints) for connection in constraints.keys(): if v >= 2: print('Creating constraints') for constraintList in constraints[connection]: for constraint in constraintList: if constraint: connection.query(constraint) if v >= 1: print('%i tables created (%i already exist)' % ( created, existing))
[docs]class CommandDrop(Command): name = 'drop' summary = 'Drop tables' parser = standard_parser(interactive=True)
[docs] def command(self): v = self.options.verbose dropped = 0 not_existing = 0 for soClass in reversed(self.classes()): exists = soClass._connection.tableExists(soClass.sqlmeta.table) if v >= 1: if exists: print('Dropping %s' % soClass.__name__) else: not_existing += 1 print('%s does not exist.' % soClass.__name__) if (not self.options.simulate and exists): if self.options.interactive: if self.ask('Drop %s' % soClass.__name__): dropped += 1 soClass.dropTable() else: print('Cancelled') else: dropped += 1 soClass.dropTable() if v >= 1: print('%i tables dropped (%i didn\'t exist)' % ( dropped, not_existing))
[docs]class CommandStatus(Command): name = 'status' summary = 'Show status of classes vs. database' help = ('This command checks the SQLObject definition and checks if ' 'the tables in the database match. It can always test for ' 'missing tables, and on some databases can test for the ' 'existance of other tables. Column types are not currently ' 'checked.') parser = standard_parser(simulate=False)
[docs] def print_class(self, soClass): if self.printed: return self.printed = True print('Checking %s...' % soClass.__name__)
[docs] def command(self): good = 0 bad = 0 missing_tables = 0 columnsFromSchema_warning = False for soClass in self.classes(require_some=True): conn = soClass._connection self.printed = False if self.options.verbose: self.print_class(soClass) if not conn.tableExists(soClass.sqlmeta.table): self.print_class(soClass) print(' Does not exist in database') missing_tables += 1 continue try: columns = conn.columnsFromSchema(soClass.sqlmeta.table, soClass) except AttributeError: if not columnsFromSchema_warning: print('Database does not support reading columns') columnsFromSchema_warning = True good += 1 continue except AssertionError as e: print('Cannot read db table %s: %s' % ( soClass.sqlmeta.table, e)) continue existing = {} for _col in columns: _col = _col.withClass(soClass) existing[_col.dbName] = _col missing = {} for _col in soClass.sqlmeta.columnList: if _col.dbName in existing: del existing[_col.dbName] else: missing[_col.dbName] = _col if existing: self.print_class(soClass) for _col in existing.values(): print(' Database has extra column: %s' % _col.dbName) if missing: self.print_class(soClass) for _col in missing.values(): print(' Database missing column: %s' % _col.dbName) if existing or missing: bad += 1 else: good += 1 if self.options.verbose: print('%i in sync; %i out of sync; %i not in database' % ( good, bad, missing_tables))
[docs]class CommandHelp(Command): name = 'help' summary = 'Show help' parser = optparse.OptionParser() max_args = 1
[docs] def command(self): if self.args:[self.invoked_as, self.args[0], '-h']) else: print('Available commands:') print(' (use "%s help COMMAND" or "%s COMMAND -h" ' % ( self.prog_name, self.prog_name)) print(' for more information)') items = sorted(the_runner.commands.items()) max_len = max([len(cn) for cn, c in items]) for command_name, command in items: print('%s:%s %s' % (command_name, ' ' * (max_len - len(command_name)), command.summary)) if command.aliases: print('%s (Aliases: %s)' % ( ' ' * max_len, ', '.join(command.aliases)))
[docs]class CommandExecute(Command): name = 'execute' summary = 'Execute SQL statements' help = ('Runs SQL statements directly in the database, with no ' 'intervention. Useful when used with a configuration file. ' 'Each argument is executed as an individual statement.') parser = standard_parser(find_modules=False) parser.add_option('--stdin', help="Read SQL from stdin " "(normally takes SQL from the command line)", dest="use_stdin", action="store_true") max_args = None
[docs] def command(self): args = self.args if self.options.use_stdin: if self.options.verbose: print("Reading additional SQL from stdin " "(Ctrl-D or Ctrl-Z to finish)...") args.append( self.conn = self.connection().getConnection() self.cursor = self.conn.cursor() for sql in args: self.execute_sql(sql)
[docs] def execute_sql(self, sql): if self.options.verbose: print(sql) try: self.cursor.execute(sql) except Exception as e: if not self.options.verbose: print(sql) print("****Error:") print(' ', e) return desc = self.cursor.description rows = self.cursor.fetchall() if self.options.verbose: if not self.cursor.rowcount: print("No rows accessed") else: print("%i rows accessed" % self.cursor.rowcount) if desc: for (name, type_code, display_size, internal_size, precision, scale, null_ok) in desc: sys.stdout.write("%s\t" % name) sys.stdout.write("\n") for row in rows: for _col in row: sys.stdout.write("%r\t" % _col) sys.stdout.write("\n") print()
[docs]class CommandRecord(Command): name = 'record' summary = 'Record historical information about the database status' help = ('Record state of table definitions. The state of each ' 'table is written out to a separate file in a directory, ' 'and that directory forms a "version". A table is also ' 'added to your database (%s) that reflects the version the ' 'database is currently at. Use the upgrade command to ' 'sync databases with code.' % SQLObjectVersionTable.sqlmeta.table) parser = standard_parser() parser.add_option('--output-dir', help="Base directory for recorded definitions", dest="output_dir", metavar="DIR", default=None) parser.add_option('--no-db-record', help="Don't record version to database", dest="db_record", action="store_false", default=True) parser.add_option('--force-create', help="Create a new version even if appears to be " "identical to the last version", action="store_true", dest="force_create") parser.add_option('--name', help="The name to append to the version. The " "version should sort after previous versions (so " "any versions from the same day should come " "alphabetically before this version).", dest="version_name", metavar="NAME") parser.add_option('--force-db-version', help="Update the database version, and include no " "database information. This is for databases that " "were developed without any interaction with " "this tool, to create a 'beginning' revision.", metavar="VERSION_NAME", dest="force_db_version") parser.add_option('--edit', help="Open an editor for the upgrader in the last " "version (using $EDITOR).", action="store_true", dest="open_editor") version_regex = re.compile(r'^\d\d\d\d-\d\d-\d\d')
[docs] def command(self): if self.options.force_db_version: self.command_force_db_version() return v = self.options.verbose sim = self.options.simulate classes = self.classes() if not classes: print("No classes found!") return output_dir = self.find_output_dir() version = os.path.basename(output_dir) print("Creating version %s" % version) conns = [] files = {} for cls in self.classes(): dbName = cls._connection.dbName if cls._connection not in conns: conns.append(cls._connection) fn = os.path.join(cls.__name__ + '_' + dbName + '.sql') if sim: continue create, constraints = cls.createTableSQL() if constraints: constraints = '\n-- Constraints:\n%s\n' % ( '\n'.join(constraints)) else: constraints = '' files[fn] = ''.join([ '-- Exported definition from %s\n' % time.strftime('%Y-%m-%dT%H:%M:%S'), '-- Class %s.%s\n' % (cls.__module__, cls.__name__), '-- Database: %s\n' % dbName, create.strip(), '\n', constraints]) last_version_dir = self.find_last_version() if last_version_dir and not self.options.force_create: if v > 1: print("Checking %s to see if it is current" % last_version_dir) files_copy = files.copy() for fn in os.listdir(last_version_dir): if not fn.endswith('.sql'): continue if fn not in files_copy: if v > 1: print("Missing file %s" % fn) break f = open(os.path.join(last_version_dir, fn), 'r') content = f.close() if (self.strip_comments(files_copy[fn]) != self.strip_comments(content)): if v > 1: print("Content does not match: %s" % fn) break del files_copy[fn] else: # No differences so far if not files_copy: # Used up all files print("Current status matches version %s" % os.path.basename(last_version_dir)) return if v > 1: print("Extra files: %s" % ', '.join(files_copy.keys())) if v: print("Current state does not match %s" % os.path.basename(last_version_dir)) if v > 1 and not last_version_dir: print("No last version to check") if not sim: os.mkdir(output_dir) if v: print('Making directory %s' % self.shorten_filename(output_dir)) files = sorted(files.items()) for fn, content in files: if v: print(' Writing %s' % self.shorten_filename(fn)) if not sim: f = open(os.path.join(output_dir, fn), 'w') f.write(content) f.close() if self.options.db_record: all_diffs = [] for cls in self.classes(): for conn in conns: diffs = db_differences(cls, conn) for diff in diffs: if len(conns) > 1: diff = ' (%s).%s: %s' % ( conn.uri(), cls.sqlmeta.table, diff) else: diff = ' %s: %s' % (cls.sqlmeta.table, diff) all_diffs.append(diff) if all_diffs: print('Database does not match schema:') print('\n'.join(all_diffs)) for conn in conns: self.update_db(version, conn) else: all_diffs = [] if self.options.open_editor: if not last_version_dir: print("Cannot edit upgrader because there is no " "previous version") else: breaker = ('-' * 20 + ' lines below this will be ignored ' + '-' * 20) pre_text = breaker + '\n' + '\n'.join(all_diffs) text = self.open_editor('\n\n' + pre_text, breaker=breaker, extension='.sql') if text is not None: fn = os.path.join(last_version_dir, 'upgrade_%s_%s.sql' % (dbName, version)) f = open(fn, 'w') f.write(text) f.close() print('Wrote to %s' % fn)
[docs] def update_db(self, version, conn): v = self.options.verbose if not conn.tableExists(SQLObjectVersionTable.sqlmeta.table): if v: print('Creating table %s' % SQLObjectVersionTable.sqlmeta.table) sql = SQLObjectVersionTable.createTableSQL(connection=conn) if v > 1: print(sql) if not self.options.simulate: SQLObjectVersionTable.createTable(connection=conn) if not self.options.simulate: SQLObjectVersionTable.clearTable(connection=conn) SQLObjectVersionTable( version=version, connection=conn)
[docs] def strip_comments(self, sql): lines = [l for l in sql.splitlines() if not l.strip().startswith('--')] return '\n'.join(lines)
[docs] def base_dir(self): base = self.options.output_dir if base is None: config = self.config() if config is not None: base = config.get('sqlobject_history_dir', '.') else: base = '.' if not os.path.exists(base): print('Creating history directory %s' % self.shorten_filename(base)) if not self.options.simulate: os.makedirs(base) return base
[docs] def find_output_dir(self): today = time.strftime('%Y-%m-%d', time.localtime()) if self.options.version_name: dir = os.path.join(self.base_dir(), today + '-' + self.options.version_name) if os.path.exists(dir): print("Error, directory already exists: %s" % dir) sys.exit(1) return dir extra = '' while 1: dir = os.path.join(self.base_dir(), today + extra) if not os.path.exists(dir): return dir if not extra: extra = 'a' else: extra = chr(ord(extra) + 1)
[docs] def find_last_version(self): names = [] for fn in os.listdir(self.base_dir()): if not continue names.append(fn) if not names: return None names.sort() return os.path.join(self.base_dir(), names[-1])
[docs] def command_force_db_version(self): v = self.options.verbose sim = self.options.simulate version = self.options.force_db_version if not print("Versions must be in the format YYYY-MM-DD...") print("You version %s does not fit this" % version) return version_dir = os.path.join(self.base_dir(), version) if not os.path.exists(version_dir): if v: print('Creating %s' % self.shorten_filename(version_dir)) if not sim: os.mkdir(version_dir) elif v: print('Directory %s exists' % self.shorten_filename(version_dir)) if self.options.db_record: self.update_db(version, self.connection())
[docs]class CommandUpgrade(CommandRecord): name = 'upgrade' summary = 'Update the database to a new version (as created by record)' help = ('This command runs scripts (that you write by hand) to ' 'upgrade a database. The database\'s current version is in ' 'the sqlobject_version table (use record --force-db-version ' 'if a database does not have a sqlobject_version table), ' 'and upgrade scripts are in the version directory you are ' 'upgrading FROM, named upgrade_DBNAME_VERSION.sql, like ' '"upgrade_mysql_2004-12-01b.sql".') parser = standard_parser(find_modules=False) parser.add_option('--upgrade-to', help="Upgrade to the given version " "(default: newest version)", dest="upgrade_to", metavar="VERSION") parser.add_option('--output-dir', help="Base directory for recorded definitions", dest="output_dir", metavar="DIR", default=None) upgrade_regex = re.compile(r'^upgrade_([a-z]*)_([^.]*)\.sql$', re.I)
[docs] def command(self): v = self.options.verbose sim = self.options.simulate if self.options.upgrade_to: version_to = self.options.upgrade_to else: fname = self.find_last_version() if fname is None: print("No version exists, use 'record' command to create one") return version_to = os.path.basename(fname) current = self.current_version() if v: print('Current version: %s' % current) version_list = self.make_plan(current, version_to) if not version_list: print('Database up to date') return if v: print('Plan:') for next_version, upgrader in version_list: print(' Use %s to upgrade to %s' % ( self.shorten_filename(upgrader), next_version)) conn = self.connection() for next_version, upgrader in version_list: f = open(upgrader) sql = f.close() if v: print("Running:") print(sql) print('-' * 60) if not sim: try: conn.query(sql) except Exception: print("Error in script: %s" % upgrader) raise self.update_db(next_version, conn) print('Done.')
[docs] def current_version(self): conn = self.connection() if not conn.tableExists(SQLObjectVersionTable.sqlmeta.table): print('No sqlobject_version table!') sys.exit(1) versions = list( if not versions: print('No rows in sqlobject_version!') sys.exit(1) if len(versions) > 1: print('Ambiguous sqlobject_version_table') sys.exit(1) return versions[0].version
[docs] def make_plan(self, current, dest): if current == dest: return [] dbname = self.connection().dbName next_version, upgrader = self.best_upgrade(current, dest, dbname) if not upgrader: print('No way to upgrade from %s to %s' % (current, dest)) print('(you need a %s/upgrade_%s_%s.sql script)' % (current, dbname, dest)) sys.exit(1) plan = [(next_version, upgrader)] if next_version == dest: return plan else: return plan + self.make_plan(next_version, dest)
[docs] def best_upgrade(self, current, dest, target_dbname): current_dir = os.path.join(self.base_dir(), current) if self.options.verbose > 1: print('Looking in %s for upgraders' % self.shorten_filename(current_dir)) upgraders = [] for fn in os.listdir(current_dir): match = if not match: if self.options.verbose > 1: print('Not an upgrade script: %s' % fn) continue dbname = version = if dbname != target_dbname: if self.options.verbose > 1: print('Not for this database: %s (want %s)' % ( dbname, target_dbname)) continue if version > dest: if self.options.verbose > 1: print('Version too new: %s (only want %s)' % ( version, dest)) upgraders.append((version, os.path.join(current_dir, fn))) if not upgraders: if self.options.verbose > 1: print('No upgraders found in %s' % current_dir) return None, None upgraders.sort() return upgraders[-1]
[docs]def update_sys_path(paths, verbose): if isinstance(paths, string_type): paths = [paths] for path in paths: path = os.path.abspath(path) if path not in sys.path: if verbose > 1: print('Adding %s to path' % path) sys.path.insert(0, path)
if __name__ == '__main__':