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Convert utf8 tables to utf8mb4 in MySQL

2017-01-232019-10-22VintaDatabase

Don’t blindly copy-paste this!

Create a custom migration in Django

2017-01-232019-10-22VintaDatabase, Python

ALTER TABLE app_repostarring CHANGE repo_description repo_description VARCHAR(191) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

Locking and MVCC in MySQL InnoDB 鎖機制與多版本並發控制

2017-01-102019-10-22VintaDatabase

最近在研究 MySQL 5.6 / 5.7 InnoDB storage engine 的 Transaction、Locking 和 Multi-Version Concurrency Control (MVCC) 機制，基本上只討論 Isolation level 是 REPEATABLE READ 或 READ COMMITTED 的情況，這一篇是過程中記錄下來的筆記。

Redirect Console Output: stdout and stderr

2017-01-022019-10-31VintaDevOps

0: stdin
1: stdout
2: stderr

Lazy evaluation in Django middlewares

2016-12-292019-10-22VintaPython, Web Development

Attach a lazy evaluated function as a property of request in a middleware.