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242 lines
9 KiB
Python
242 lines
9 KiB
Python
"""
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Helper class for automatic testing, provides dump and restore via command
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line utilities.
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Expect mongodump and mongorestore present at MONGODB_UTILS_DIR
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"""
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import os
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import pymongo
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import subprocess
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class DBHandler():
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# vendorize ??
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MONGODB_UTILS_DIR = "c:\\Program Files\\MongoDB\\Server\\4.4\\bin"
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def __init__(self, uri=None, host=None, port=None,
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user=None, password=None):
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"""'uri' or rest of separate credentials"""
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if uri:
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self.uri = uri
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if host:
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if all([user, password]):
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host = "{}:{}@{}".format(user, password, host)
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uri = 'mongodb://{}:{}'.format(host, port or 27017)
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assert uri, "Must have uri to MongoDB"
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self.client = pymongo.MongoClient(uri)
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self.db = None
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def setup_empty(self, name):
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# not much sense
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self.db = self.client[name]
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def setup_from_sql(self, db_name, sql_dir, collection=None,
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drop=True, mode=None):
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"""
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Restores 'db_name' from 'sql_url'.
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Works with directory with .json files,
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if 'collection' arg is empty, name
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of .json file is used as name of target collection.
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Args:
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db_name (str): source DB name
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sql_dir (str): folder with json files
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collection (str): if all sql files are meant for single coll.
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drop (bool): True if drop whole collection
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mode (str): "insert" - fails on duplicates
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"upsert" - modifies existing
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"merge" - updates existing
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"delete" - removes in DB present if file
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"""
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if not os.path.exists(sql_dir):
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raise RuntimeError(
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"Backup folder {} doesn't exist".format(sql_dir))
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for (dirpath, dirnames, filenames) in os.walk(sql_dir):
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for file_name in filenames:
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sql_url = os.path.join(dirpath, file_name)
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query = self._import_query(self.uri, sql_url,
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db_name=db_name,
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collection=collection,
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drop=drop,
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mode=mode)
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print("mongoimport query:: {}".format(query))
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subprocess.run(query)
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def setup_from_sql_file(self, db_name, sql_url,
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collection=None, drop=True, mode=None):
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"""
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Restores 'db_name' from 'sql_url'.
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Works with single .json file.
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If 'collection' arg is empty, name
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of .json file is used as name of target collection.
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Args:
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db_name (str): source DB name
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sql_file (str): folder with json files
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collection (str): name of target collection
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drop (bool): True if drop collection
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mode (str): "insert" - fails on duplicates
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"upsert" - modifies existing
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"merge" - updates existing
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"delete" - removes in DB present if file
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"""
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if not os.path.exists(sql_url):
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raise RuntimeError(
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"Sql file {} doesn't exist".format(sql_url))
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query = self._import_query(self.uri, sql_url,
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db_name=db_name,
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collection=collection,
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drop=drop,
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mode=mode)
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print("mongoimport query:: {}".format(query))
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subprocess.run(query)
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def setup_from_dump(self, db_name, dump_dir, overwrite=False,
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collection=None, db_name_out=None):
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"""
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Restores 'db_name' from 'dump_dir'.
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Works with BSON folders exported by mongodump
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Args:
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db_name (str): source DB name
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dump_dir (str): folder with dumped subfolders
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overwrite (bool): True if overwrite target
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collection (str): name of source project
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db_name_out (str): name of target DB, if empty restores to
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source 'db_name'
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"""
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db_name_out = db_name_out or db_name
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if self._db_exists(db_name) and not overwrite:
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raise RuntimeError("DB {} already exists".format(db_name_out) +
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"Run with overwrite=True")
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dir_path = os.path.join(dump_dir, db_name)
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if not os.path.exists(dir_path):
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raise RuntimeError(
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"Backup folder {} doesn't exist".format(dir_path))
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query = self._restore_query(self.uri, dump_dir,
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db_name=db_name, db_name_out=db_name_out,
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collection=collection)
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print("mongorestore query:: {}".format(query))
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subprocess.run(query)
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def teardown(self, db_name):
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"""Drops 'db_name' if exists."""
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if not self._db_exists(db_name):
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print("{} doesn't exist".format(db_name))
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return
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print("Dropping {} database".format(db_name))
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self.client.drop_database(db_name)
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def backup_to_dump(self, db_name, dump_dir, overwrite=False):
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"""
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Helper class for running mongodump for specific 'db_name'
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"""
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if not self._db_exists(db_name) and not overwrite:
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raise RuntimeError("DB {} doesn't exists".format(db_name))
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dir_path = os.path.join(dump_dir, db_name)
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if os.path.exists(dir_path) and not overwrite:
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raise RuntimeError("Backup already exists, "
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"run with overwrite=True")
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query = self._dump_query(self.uri, dump_dir, db_name=db_name)
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print("Mongodump query:: {}".format(query))
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subprocess.run(query)
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def _db_exists(self, db_name):
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return db_name in self.client.list_database_names()
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def _dump_query(self, uri,
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output_path,
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db_name=None, collection=None):
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utility_path = os.path.join(self.MONGODB_UTILS_DIR, "mongodump")
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db_part = coll_part = ""
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if db_name:
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db_part = "--db={}".format(db_name)
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if collection:
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if not db_name:
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raise ValueError("db_name must be present")
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coll_part = "--nsInclude={}.{}".format(db_name, collection)
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query = "\"{}\" --uri=\"{}\" --out={} {} {}".format(
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utility_path, uri, output_path, db_part, coll_part
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)
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return query
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def _restore_query(self, uri, dump_dir,
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db_name=None, db_name_out=None,
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collection=None, drop=True):
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utility_path = os.path.join(self.MONGODB_UTILS_DIR, "mongorestore")
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db_part = coll_part = drop_part = ""
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if db_name:
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db_part = "--nsInclude={}.* --nsFrom={}.*".format(db_name, db_name)
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if collection:
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assert db_name, "Must provide db name too"
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db_part = "--nsInclude={}.{} --nsFrom={}.{}".format(db_name,
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collection,
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db_name,
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collection)
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if drop:
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drop_part = "--drop"
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if db_name_out:
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db_part += " --nsTo={}.*".format(db_name_out)
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query = "\"{}\" --uri=\"{}\" --dir=\"{}\" {} {} {}".format(
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utility_path, uri, dump_dir, db_part, coll_part, drop_part
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)
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return query
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def _import_query(self, uri, sql_url,
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db_name=None,
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collection=None, drop=True, mode=None):
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utility_path = os.path.join(self.MONGODB_UTILS_DIR, "mongoimport")
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db_part = coll_part = drop_part = mode_part = ""
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if db_name:
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db_part = "--db {}".format(db_name)
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if collection:
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assert db_name, "Must provide db name too"
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coll_part = "--collection {}".format(collection)
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if drop:
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drop_part = "--drop"
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if mode:
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mode_part = "--mode {}".format(mode)
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query = \
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"\"{}\" --legacy --uri=\"{}\" --file=\"{}\" {} {} {} {}".format(
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utility_path, uri, sql_url,
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db_part, coll_part, drop_part, mode_part)
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return query
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# handler = DBHandler(uri="mongodb://localhost:27017")
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#
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# backup_dir = "c:\\projects\\dumps"
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# #
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# # handler.backup_to_dump("openpype", backup_dir, True)
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# # handler.setup_from_dump("test_db", backup_dir, True)
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# # handler.setup_from_sql_file("test_db", "c:\\projects\\sql\\item.sql",
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# # collection="test_project",
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# # drop=False, mode="upsert")
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# handler.setup_from_sql("test_db", "c:\\projects\\sql",
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# collection="test_project",
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# drop=False, mode="upsert")
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