Ramal.Change (Ramal v0.2.0)

One row-level difference between a branch and its base, as Ramal.diff/1 returns it.

kind says whether the branch created, updated or deleted the row. changes maps attribute names to {before, after}: for a created row every before is nil, for a deleted row every after is nil, and for an updated row only the attributes whose value differs appear.

Example

iex> %Ramal.Change{
...>   resource: MyApp.Herd,
...>   key: "R7",
...>   kind: :updated,
...>   changes: %{paddock_id: {"L07", "L18"}}
...> }.changes
%{paddock_id: {"L07", "L18"}}

Summary

Types

kind()

t()

Types

kind()

@type kind() :: :created | :updated | :deleted

t()

@type t() :: %Ramal.Change{
  changes: %{optional(atom()) => {before :: term(), after_value :: term()}},
  key: term(),
  kind: kind(),
  resource: module()
}