# `Ramal.Change`
[🔗](https://github.com/agustinrojas1/ramal/blob/v0.2.0/lib/ramal/change.ex#L1)

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"}}

# `kind`

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

# `t`

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

---

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