Ecto v3.5.0-rc.1
Ecto

Ecto.Adapter.Schema behaviour (Ecto v3.5.0-rc.1) View Source

Specifies the schema API required from adapters.

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Types

adapter_meta()

Proxy type to the adapter meta

constraints()
fields()
filters()
on_conflict()
options()
returning()
schema_meta()

Ecto.Schema metadata fields

Callbacks

autogenerate(field_type)

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

delete(adapter_meta, schema_meta, filters, options)

Deletes a single struct with the given filters.

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

Inserts a single new struct in the data store.

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

Inserts multiple entries into the data store.

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

Updates a single struct with the given filters.

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adapter_meta()

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Specs

adapter_meta() :: Ecto.Adapter.adapter_meta()

Proxy type to the adapter meta

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constraints()

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Specs

constraints() :: Keyword.t()
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fields()

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Specs

fields() :: Keyword.t()
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filters()

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Specs

filters() :: Keyword.t()
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on_conflict()

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Specs

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

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Specs

options() :: Keyword.t()
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returning()

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Specs

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

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Specs

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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Specs

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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Specs

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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Specs

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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Specs

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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Specs

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.