使用迁移文件将MySQL-DB-Dump导入Rails应用程序

Question

I have an old PHP application with a bunch of MySQL tables. I want to rewrite it with Rails(3) and want to import the old data. How can I write a migration-script to import the MySQL-Dump into a sqlite DB?

Answer 1

It's out of my merit to judge why migrate from mysql to sqlite3 db. Why not run your dev environment as well in mysql? anyway, following is the script.

#!/bin/sh 

mysqldump --compact --compatible=ansi --default-character-set=binary mydbname | 
grep -v ' KEY "' | 
grep -v ' UNIQUE KEY "' | 
perl -e 'local $/;$_=<>;s/,\n\)/\n\)/gs;print "begin;\n";print;print "commit;\n"' | 
perl -pe ' 
if (/^(INSERT.+?)\(/) { 
$a=$1; 
s/\\'\''/'\'\''/g; 
s/\\n/\n/g; 
s/\),\(/\);\n$a\(/g; 
} ' | sqlite3 output.db

Answer 2

我使用DATA DB Dump（不是模式）解决了问题，并使用另一个迁移文件和create_table创建了表。