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Data mapper and and DSL for writing queries and interacting with PostgreSQL databases in Erlang

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repo src repo_model.erl
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src/repo_model.erl 

-module(repo_model).



-callback schema() -> repo:schema().



-callback before_save(epgpool:connection(), Model) -> Model.

-optional_callbacks([before_save/2]).



-callback after_save(epgpool:connection(), Model :: any()) -> ok.

-optional_callbacks([after_save/2]).



-callback from_db([FieldNames :: atom()]) -> fun((Data :: [any()]) -> Model :: any()).

-callback to_db(Model :: any()) -> DbModel :: #{ atom() => any() }.



-export([

         before_save/2,

         after_save/2,

         from_db/1,

         to_db/1

        ]).



before_save(_C, Model) -> Model.

after_save(_C, _Model) -> ok.



from_db(Fields) ->

    fun(Values) -> maps:from_list(lists:zip(Fields, Values)) end.



to_db(Model) -> Model.