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Python MySQL upsert
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#!/usr/bin/env python | |
# encoding: utf-8 | |
import MySQLdb | |
from upsert import upsert | |
db = MySQLdb.connect(host="localhost", user="root", passwd="", db="demo", charset="utf8") | |
c = db.cursor() | |
import warnings | |
warnings.filterwarnings("ignore", "Unknown table.*") | |
c.execute("""DROP TABLE IF EXISTS upsert_demo""") | |
c.execute("""CREATE TABLE upsert_demo ( | |
`id` int(11) unsigned NOT NULL, | |
`foo` varchar(100) DEFAULT NULL, | |
PRIMARY KEY (`id`) | |
) ENGINE=InnoDB DEFAULT CHARSET=utf8""") | |
c.execute("""INSERT INTO upsert_demo | |
(`id`,`foo`) | |
VALUES (1, 'baz')""") | |
demo_fields = ("id","foo") | |
demo_objects = [(1,"upserted!"),(2,"new record")] | |
upsert(db,"upsert_demo",demo_fields,demo_objects) |
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MySQL-python>=1.2.5 |
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#!/usr/bin/env python | |
# encoding: utf-8 | |
def upsert(db, table, fields, object_list): | |
cursor = db.cursor() | |
table = "`"+db.escape_string(table)+"`" | |
fields = ["`"+db.escape_string(field)+"`" for field in fields] | |
placeholders = ["%s" for field in fields] | |
assignments = ["`{x}` = VALUES(`{x}`)".format( | |
x=db.escape_string(x) | |
) for x in fields] | |
query_string = """INSERT INTO | |
{table} | |
({fields}) | |
VALUES | |
({placeholders}) | |
ON DUPLICATE KEY UPDATE {assignments}""" | |
cursor.executemany(query_string.format( | |
table=table, | |
fields=", ".join(fields), | |
placeholders=", ".join(placeholders), | |
assignments=", ".join(assignments) | |
), object_list) | |
db.commit() |
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Thank you very much for sharing