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phoenix

1.8.3
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Productive. Reliable. Fast. A productive web framework that does not compromise speed or maintainability.

Security advisory: This version has known vulnerabilities. View advisories
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phoenix usage-rules ecto.md
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usage-rules/ecto.md 

## Ecto Guidelines



- **Always** preload Ecto associations in queries when they'll be accessed in templates, ie a message that needs to reference the `message.user.email`

- Remember `import Ecto.Query` and other supporting modules when you write `seeds.exs`

- `Ecto.Schema` fields always use the `:string` type, even for `:text`, columns, ie: `field :name, :string`

- `Ecto.Changeset.validate_number/2` **DOES NOT SUPPORT the `:allow_nil` option**. By default, Ecto validations only run if a change for the given field exists and the change value is not nil, so such as option is never needed

- You **must** use `Ecto.Changeset.get_field(changeset, :field)` to access changeset fields

- Fields which are set programatically, such as `user_id`, must not be listed in `cast` calls or similar for security purposes. Instead they must be explicitly set when creating the struct

- **Always** invoke `mix ecto.gen.migration migration_name_using_underscores` when generating migration files, so the correct timestamp and conventions are applied