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Sequelize和Graphql反向查找

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我有两个型号：

River.associate = models => {
  River.hasMany(models.Fish, { as: 'Fishes' });
};

Fish.associate = models => {
  Fish.belongsTo(models.River);
};

type River {
    id: ID!
    name: String!
    alternative: String!
    geojson: JSON
    fishes: [Fish]
}

type Fish {
  id: ID!
  name: String!
}

How would I findAll Rivers given a list of Fish ID's? 我不确定查询必须如何查找graphql和sequelize？

type Query {
  river(id: ID!): River
  **rivers(fishIds: ARRAY): River ??????**
  fishes: [Fish]
}

Query: {
rivers: (_, { fishIds }) => {
      return River.findAll({
        where: {
          fishes: fishIds
        }
      });
    },
}
express sequelize.js graphql apollo-server

1 回答

  • 1

    您可以为包含的每个模型指定 WHERE 子句 . 此外，这样做会将预期加载转换为内部联接（这是您想要的），除非您明确将 required 参数设置为 false .

    这意味着你应该能够做到这样的事情：

    River.findAll({ include:
  [
    {
      model: Fish,
      where: { id: fishIds }
    },
  ],
})
    回复于

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