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entc/mutation: explain when object is fetched from db (#496)

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This commit is contained in:
Ariel Mashraki
2020-05-21 10:10:52 +03:00
committed by GitHub
parent 5ed339839a
commit dbf6bb8006
23 changed files with 539 additions and 181 deletions
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4
entc/gen/template/builder/mutation.tmpl
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@@ -175,7 +175,9 @@ func (m *{{ $mutation }}) ID() (id {{ $n.ID.Type }}, exists bool) {
return *v, true
}
// {{ $f.MutationGetOld }} returns the old {{ $f.Name }} value, if exists.
// {{ $f.MutationGetOld }} returns the old {{ $f.Name }} value of the {{ $n.Name }}.
// If the {{ $n.Name }} object wasn't provided to the builder, the object is fetched
// from the database.
// An error is returned if the mutation operation is not UpdateOne, or database query fails.
func (m *{{ $mutation }}) {{ $f.MutationGetOld }}(ctx context.Context) (v {{ if $f.Nillable }}*{{ end }}{{ $f.Type }}, err error) {
if !m.op.Is(OpUpdateOne) {