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Make explicit `schema generate` command for migration data tests 

These flags are mentioned in the prose of this section, but it's
easy to miss them (or at least, I missed them) there and rely on
the `schema generate` command given in the previous section.
That one generates the expected files, but with this section's code
it leads to an error:

    Unsupported operation: TableInfo.map in schema verification code

because the generated code has a stub implementation of `map`.

Make it easier to spot the need for these flags by providing an
explicit complete command using them.
This commit is contained in:
Greg Price 2023-02-27 20:36:01 -08:00
parent b137b4065e
commit 3ab33227b7
1 changed files with 5 additions and 1 deletions
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6
docs/pages/docs/Advanced Features/migrations.md
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@ -396,7 +396,11 @@ This can be used to insert data before a migration. After the migration ran, you
Note that you can't use the regular database class from you app for this, since its data classes always expect the latest
schema. However, you can instruct drift to generate older snapshots of your data classes and companions for this purpose.
To enable this feature, pass the `--data-classes` and `--companions` command-line arguments to the `drift_dev schema generate`
command.
command:
```
$ dart run drift_dev schema generate --data-classes --companions drift_schemas/ test/generated_migrations/
```
Then, you can import the generated classes with an alias: