Upsert allowing keys to be excluded #103
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This PR adds
exclude:
toupsert_options
to allow one to leave certain attributes alone during an upsert. The use case is when a column is defined asNOT NULL DEFAULT "something"
and an attempt to insert NULL into that column is unwanted.This includes minimal passing tests.
Ruby 2.3+ is required due to the safe navigation operator being used once. If that's undesirable, an explicit check for nil could be used instead.