Abort migration if a given table refer by other tables using foreign key constraints #147
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Abort migration if table refer by other tables using Foreign key constraints
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The original problem in issue #141 was that if we alter table having external constraints (i.e refer by other tables using foreign key constraints) using lhm. it modifies the table without any warning and errors and lhm uses a method of modification is copy table and rename strategy when lhm renames origin table that time all references get changed. In MySQL renaming of tables works like it changes all external references to a new_table so it causing an issue after migration runs. I have faced this issue as well
So in this pull request have just added validation it checks external foreign key constraints for given table and if it founds any table having references so it aborts the migration. Need of this validation till the time LHM/we provide any solution for rebuilding for foreign key constraints