Ecto v3.2.2 Ecto.Adapter.Schema behaviour View Source

Specifies the schema API required from adapters.

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Types

Proxy type to the adapter meta

Ecto.Schema metadata fields

Callbacks

Called to autogenerate a value for id/embed_id/binary_id.

Deletes a single struct with the given filters.

Updates a single struct with the given filters.

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Proxy type to the adapter meta

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constraints()

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constraints() :: Keyword.t()
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on_conflict()

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on_conflict() ::
  {:raise, list(), []}
  | {:nothing, list(), [atom()]}
  | {[atom()], list(), [atom()]}
  | {Ecto.Query.t(), list(), [atom()]}
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returning()

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returning() :: [atom()]
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schema_meta()

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schema_meta() :: %{
  autogenerate_id:
    {schema_field :: atom(), source_field :: atom(), Ecto.Type.t()},
  context: term(),
  prefix: binary() | nil,
  schema: atom(),
  source: binary()
}

Ecto.Schema metadata fields

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autogenerate(field_type)

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autogenerate(field_type :: :id | :binary_id | :embed_id) :: term() | nil

Called to autogenerate a value for id/embed_id/binary_id.

Returns the autogenerated value, or nil if it must be autogenerated inside the storage or raise if not supported.

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delete(adapter_meta, schema_meta, filters, options)

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delete(adapter_meta(), schema_meta(), filters(), options()) ::
  {:ok, fields()} | {:invalid, constraints()} | {:error, :stale}

Deletes a single struct with the given filters.

While filters can be any record column, it is expected that at least the primary key (or any other key that uniquely identifies an existing record) be given as a filter. Therefore, in case there is no record matching the given filters, {:error, :stale} is returned.

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insert(adapter_meta, schema_meta, fields, on_conflict, returning, options)

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insert(
  adapter_meta(),
  schema_meta(),
  fields(),
  on_conflict(),
  returning(),
  options()
) :: {:ok, fields()} | {:invalid, constraints()}

Inserts a single new struct in the data store.

Autogenerate

The primary key will be automatically included in returning if the field has type :id or :binary_id and no value was set by the developer or none was autogenerated by the adapter.

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insert_all(adapter_meta, schema_meta, header, list, on_conflict, returning, options)

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insert_all(
  adapter_meta(),
  schema_meta(),
  header :: [atom()],
  [[{atom(), term() | {Ecto.Query.t(), list()}}]],
  on_conflict(),
  returning(),
  options()
) :: {integer(), [[term()]] | nil}

Inserts multiple entries into the data store.

In case an Ecto.Query given as any of the field values by the user, it will be sent to the adapter as a tuple with in the shape of {query, params}.

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update(adapter_meta, schema_meta, fields, filters, returning, options)

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update(
  adapter_meta(),
  schema_meta(),
  fields(),
  filters(),
  returning(),
  options()
) :: {:ok, fields()} | {:invalid, constraints()} | {:error, :stale}

Updates a single struct with the given filters.

While filters can be any record column, it is expected that at least the primary key (or any other key that uniquely identifies an existing record) be given as a filter. Therefore, in case there is no record matching the given filters, {:error, :stale} is returned.