Question

我尝试使用Absinthe#Batch进行简单查询，但正在执行Ecto查询的函数不会返回任何结果。

我添加了一些跟踪来计算db上的记录。 预计会始终返回1，但不会。

解析器：

def get_cards_for_stage(stage, _args, _ctx) do
  IO.puts "Before batch: #{OfferSid.Repo.aggregate(from(p in "pipeline_cards"), :count, :id)}"

  batch({__MODULE__, :pipeline_cards_by_stage_ids}, stage.id, fn batch_results ->

  IO.puts "Inside batch: #{OfferSid.Repo.aggregate(from(p in "pipeline_cards"), :count, :id)}"
    {:ok, Map.get(batch_results, stage.id)}
  end)
end

助手方法：

def pipeline_cards_by_stage_ids(_args, stages_ids) do
  IO.puts "On the helper method: #{OfferSid.Repo.aggregate(Ecto.Query.from(p in "pipeline_cards"), :count, :id)}"

  cards = OfferSid.pipeline_cards_by_stage_ids(stages_ids)
  Map.new(cards, fn s -> {s.pipeline_stage_id, s} end)
end

一些追踪：

  # Before batch: 1
  # Before batch: 1
  # Before batch: 1
  # On the helper method: 0
  # Inside batch: 1
  # Inside batch: 1
  # Inside batch: 1

Answer 1

正如benwilson512提到here，问题是数据库连接不是shared。

所以，我修正了它：

before do
  Ecto.Adapters.SQL.Sandbox.mode(Repo, {:shared, self()})
end

Ecto查询不适用于Absinthe分辨率

1 个答案: