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graphql查询返回空值

express-graphql

1

Daniel · 技术社区 · 6 年前

我运行了这个成功的突变,它被保存到我的MongoDB数据库中:

mutation {
  addRecipe(name: "Chole Dhania Masala", category: "Indian", description: "A tasty dish", instructions: "Cook it") {
    name
    category
    description
    instructions
  }
}

但是,当我为它运行查询时:

query {
  getAllRecipes {
    _id
    name
    category
    likes
    createdDate
  }
}

我不清楚我为什么得到:

{
  "data": {
    "getAllRecipes": null
  }
}

这是我的 resolvers.js 文件:

exports.resolvers = {
    Query: {
        getAllRecipes: async (root, args, { Recipe }) => {
            const allRecipes = await Recipe.find();
            return allRecipes;
        }
    },
    Mutation: {
        addRecipe: async (root, { name, description, category, instructions, username }, { Recipe }) => {
            const newRecipe = await new Recipe({
                name,
                description,
                category,
                instructions,
                username
            }).save();
            return newRecipe;
        }
    }
};

1 回复 | 直到 6 年前

1

0

Yegor Zaremba 6 年前

你有吗 recipes ?

Query: {
    getAllRecipes: async (root, args, { Recipe }) => {
        const allRecipes = await Recipe.find();
        if (allRecipes) {
          return allRecipes;
        }

        return null;
    }
}