method
find_by
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find_by(*args)
public
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# File activerecord/lib/active_record/core.rb, line 186 def find_by(*args) # :nodoc: return super if scope_attributes? || reflect_on_all_aggregations.any? || columns_hash.key?(inheritance_column) && base_class != self hash = args.first return super if !(Hash === hash) || hash.values.any? { |v| StatementCache.unsupported_value?(v) } # We can't cache Post.find_by(author: david) ...yet return super unless hash.keys.all? { |k| columns_hash.has_key?(k.to_s) } keys = hash.keys statement = cached_find_by_statement(keys) { |params| wheres = keys.each_with_object({}) { |param, o| o[param] = params.bind } where(wheres).limit(1) } begin statement.execute(hash.values, connection).first rescue TypeError raise ActiveRecord::StatementInvalid rescue ::RangeError nil end end