Serialize metadata to a JSON string — metadata_to

Round-trips column types, primary key, and the structural constraints (equality, inequality, fixed_combinations). custom_constraint cannot be serialized — it holds an R closure — and is dropped with a warning.

Usage

metadata_to_json(meta)

Arguments

meta: An rsdv_metadata object.

Value

A JSON character string. Inverse of metadata_from_json().

Examples

meta <- metadata() |>
  set_column_type("a", "numerical") |>
  set_column_type("b", "numerical") |>
  add_constraint(inequality_constraint("a", "b", type = "lt"))
json <- metadata_to_json(meta)
meta2 <- metadata_from_json(json)