# `MishkaGervaz.Table.Transformers.MergeDefaults`
[🔗](https://github.com/mishka-group/mishka_gervaz/blob/v0.0.1-alpha.3/lib/mishka_gervaz/table/transformers/merge_defaults.ex#L1)

Merges default values into the DSL configuration.

This transformer fills in sensible defaults for unspecified options,
including:

- Inheriting defaults from the domain (if using `MishkaGervaz.Domain`)
- Deriving `identity.name` from the resource module name
- Generating `identity.stream_name` if not specified

If a domain declares `master_check`, it flows to the resource's
`source.master_check`. If neither domain nor resource declares one,
`Info.Table` leaves it `nil`; callers should check for `nil` (no
fallback is injected, unlike the form side which falls back to
`MishkaGervaz.Helpers.master_user?/1` via `Info.Form`).

See `MishkaGervaz.Table.Transformers.BuildDomainConfig` (upstream),
`MishkaGervaz.Table.Transformers.ResolveColumns` (downstream),
`MishkaGervaz.Table.Transformers.BuildRuntimeConfig` (final),
`MishkaGervaz.Table.Transformers.Helpers`, and the form-side
counterpart `MishkaGervaz.Form.Transformers.MergeDefaults`.

# `after?`

# `after_compile?`

# `before?`

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*Consult [api-reference.md](api-reference.md) for complete listing*