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25 lines
1,021 B
Markdown
25 lines
1,021 B
Markdown
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# New Migrations
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Every set of modifications to the database schema should be done through a new Migration.
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The task for this is `migrations:new`, and its full documentation is available with the usual help command:
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php index.php migrations:new --help
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The `migrations:new` task takes three parameters: *group*, *location*, and *description*.
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A new file will be created, containing the skeleton of a child class of [Minion_Migration_Base]
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that must be fleshed out with code to perform the migration (and its reversal).
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## Group
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Groups provide a means to run particular sets of Migrations separately.
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Every Migration must be in a group.
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For modules' Migrations, the group name is usually the same as the module name (or at least prefixed with it).
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## Description
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The description is optional, and if provided will be turned into a normalised suffix
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for the Migration class's file (e.g. `20130529140938_initial-installation.php`)
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and also shown in the output of the `status` and `run` tasks.
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