magic-removal: Implemented 'manage.py syncdb'
git-svn-id: http://code.djangoproject.com/svn/django/branches/magic-removal@2398 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Adrian Holovaty
parent
e13ae5a645
commit
5f4fe3d02d
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@ -72,6 +72,51 @@ def get_version():
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v += ' (%s)' % VERSION[3]
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return v
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def sql_for_table(model):
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from django.db import backend, get_creation_module, models
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data_types = get_creation_module().DATA_TYPES
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if not data_types:
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# This must be the "dummy" database backend, which means the user
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# hasn't set DATABASE_ENGINE.
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sys.stderr.write("Error: Django doesn't know which syntax to use for your SQL statements,\n" +
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"because you haven't specified the DATABASE_ENGINE setting.\n" +
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"Edit your settings file and change DATABASE_ENGINE to something like 'postgresql' or 'mysql'.\n")
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sys.exit(1)
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opts = model._meta
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field_metadata = []
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references = []
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for f in opts.fields:
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if isinstance(f, models.ForeignKey):
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rel_field = f.rel.get_related_field()
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data_type = get_rel_data_type(rel_field)
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else:
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rel_field = f
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data_type = f.get_internal_type()
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col_type = data_types[data_type]
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if col_type is not None:
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# Make the definition (e.g. 'foo VARCHAR(30)') for this field.
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field_output = [backend.quote_name(f.column), col_type % rel_field.__dict__]
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field_output.append('%sNULL' % (not f.null and 'NOT ' or ''))
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if f.unique:
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field_output.append('UNIQUE')
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if f.primary_key:
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field_output.append('PRIMARY KEY')
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if f.rel:
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references.append((f.rel.to, model, f))
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field_metadata.append(field_output)
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if opts.order_with_respect_to:
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field_metadata.append((backend.quote_name('_order'), data_types['IntegerField'], 'NULL'))
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table_metadata = []
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for field_constraints in opts.unique_together:
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table_metadata.append(['UNIQUE (%s)' % \
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", ".join([backend.quote_name(opts.get_field(f).column) for f in field_constraints])])
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return field_metadata, table_metadata, references
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def get_sql_create(app):
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"Returns a list of the CREATE TABLE SQL statements for the given app."
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from django.db import backend, get_creation_module, models
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@ -365,16 +410,74 @@ get_sql_all.args = APP_ARGS
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def syncdb():
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"Creates the database tables for all apps in INSTALLED_APPS whose tables haven't already been created."
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from django.db import connection, models, get_introspection_module
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from django.db import backend, connection, models, get_creation_module, get_introspection_module
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introspection_module = get_introspection_module()
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data_types = get_creation_module().DATA_TYPES
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cursor = connection.cursor()
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# Get a list of all existing database tables,
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# so we know what needs to be added.
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table_list = introspection_module.get_table_list(cursor)
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for cls in models.get_models():
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db_table = cls._meta.db_table
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if db_table not in table_list:
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print " Need to create %s" % db_table
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print "Done"
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pending_references = []
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for app in models.get_apps():
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model_list = models.get_models(app)
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for model in model_list:
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# Create the model's database table, if it doesn't already exist.
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if model._meta.db_table in table_list:
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continue
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field_metadata, table_metadata, references = sql_for_table(model)
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pending_references.extend(references)
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sql = "CREATE TABLE %s (\n %s\n)" % \
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(backend.quote_name(model._meta.db_table),
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",\n ".join([' '.join(i) for i in field_metadata + table_metadata]))
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print "Creating table %s" % model._meta.db_table
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cursor.execute(sql)
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for model in model_list:
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# Create the many-to-many join table, if it doesn't already exist.
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for f in model._meta.many_to_many:
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if f.m2m_db_table() in table_list:
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continue
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# This table doesn't exist yet and needs to be created.
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table_output = ['CREATE TABLE %s (' % backend.quote_name(f.m2m_db_table())]
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table_output.append(' %s %s NOT NULL PRIMARY KEY,' % (backend.quote_name('id'), data_types['AutoField']))
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table_output.append(' %s %s NOT NULL REFERENCES %s (%s),' % \
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(backend.quote_name(f.m2m_column_name()),
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data_types[get_rel_data_type(model._meta.pk)] % model._meta.pk.__dict__,
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backend.quote_name(model._meta.db_table),
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backend.quote_name(model._meta.pk.column)))
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table_output.append(' %s %s NOT NULL REFERENCES %s (%s),' % \
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(backend.quote_name(f.m2m_reverse_name()),
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data_types[get_rel_data_type(f.rel.to._meta.pk)] % f.rel.to._meta.pk.__dict__,
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backend.quote_name(f.rel.to._meta.db_table),
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backend.quote_name(f.rel.to._meta.pk.column)))
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table_output.append(' UNIQUE (%s, %s)' % \
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(backend.quote_name(f.m2m_column_name()),
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backend.quote_name(f.m2m_reverse_name())))
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table_output.append(')')
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sql = '\n'.join(table_output)
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print "Creating table %s" % f.m2m_db_table()
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cursor.execute(sql)
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# Create the pending references.
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# Take care of any ALTER TABLE statements to add constraints
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# after the fact.
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if backend.supports_constraints:
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for model, rel_class, field in pending_references:
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rel_opts = rel_class._meta
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r_table = rel_opts.db_table
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r_col = field.column
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table = model._meta.db_table
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col = model._meta.get_field(field.rel.field_name).column
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sql = 'ALTER TABLE %s ADD CONSTRAINT %s FOREIGN KEY (%s) REFERENCES %s (%s);' % \
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(backend.quote_name(r_table),
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backend.quote_name("%s_referencing_%s_%s" % (r_col, table, col)),
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backend.quote_name(r_col), backend.quote_name(table), backend.quote_name(col))
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cursor.execute(sql)
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connection.commit()
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syncdb.args = ''
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def has_no_records(cursor):
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