# `Lotus.Migrations.Postgres.V6`
[🔗](https://github.com/elixir-lotus/lotus/blob/v1.1.0/lib/lotus/migrations/postgres/v6.ex#L1)

Add `source_query_id` and `depends_on_filter_id` to `lotus_dashboard_filters`.

A filter with a `source_query_id` gets its select options from that saved
query. A filter with a `depends_on_filter_id` passes the value of that other
filter to its source query, so the options of one filter can depend on the
value of another.

Both columns are nullable, and a delete of the referenced query or filter sets
them to `NULL`. Every existing row keeps its static options, so there is no
backfill.

# `down`

# `up`

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