helicon
Update JSONB documents in tables
I have a schema:
schema "assets" do
field :title, :string
field :description, :string
field :files, :map
end
I don’t want to use a embedded schema for :files, because there may be a large list of optional fields here. So is it good way to update my :files JSONB document?
Resources.update_asset(asset, %{files: Map.merge(asset.files, new_params)})
It works, but looks not elegant. Actually there is not even a PostgreSQL jsonb concatenate function || used, because my data is concatenated at the Elixir level.
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OvermindDL1
This is what fragment is for, then you can do it all in-query without it ever needing to arrive locally if you so want. 
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