EddTally
Hi,
I am currently having problems trying to update a nested map in a Schema since it doesn’t allow for Access behaviour I can’t just Kernel.put_in etc…
My Schema is as follows:
> %PhoenixApi.Schema.Test{
> __meta__: #Ecto.Schema.Metadata<:loaded, "test_table">,
> id: 1,
> delete: false,
> person: %{
> "city" => %{"55" => "London"},
> "name" => "john cena"
> "address" => "55 Test Drive"
> }
> }
I use get_test(id) to retrieve this information, but I would like to change the persons name and city before updating it/sending it back into my table.
This person is stored as a :map in the schema.
I know update needs a changeset to work, it’s how to make the changes in the changeset for Ecto.update and updating nested maps in structs is confusing me, sorry.
Thank you for reading.
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First 2 of 2 Posts
EddTally
I have created a workaround? method?
I pattern match out of the
get_test(id).old_person = get_test(id)%{id: id, delete: delete, person: person} = old_personnew_person = %{id: id, delete: delete, person: person}Then I can use:
new_person = Kernel.put_in(new_person, [:person, "name"], "New Name")because it is purely just a map now and not a Schema, then update row via the auto generated context function update_person:
by
update_person(old_person, new_person)and BAM it’s updated.
If anyone has any improvements I would love to hear them!
vfsoraki
You may also look into
embeds_oneto have your map treated as an embedded schema, with defined fields/changeset.As for what you’ve achieved, that what I would do for a bare map too.