检查缺少的解析器

Question

您将如何扫描架构以查找缺少查询和非标量字段的解析器？

我正在尝试使用动态架构，因此我需要能够以编程方式对此进行测试。我一直在浏览 graphql 工具几个小时以找到执行此操作的方法，但我一无所获...

checkForResolveTypeResolver - 这仅适用于接口和联合 resolveType 解析器
我找不到知道何时应用 defaultFieldResolver 的方法
我尝试使用自定义指令添加@requiredResolver，以帮助识别这些字段，但自定义解析器远未得到完全支持：
- introspection & directives
- no graphql-js directives handler（可以使用 graphql-tools 解决这个问题）

感谢任何帮助！

Answer 1

给定一个 GraphQLSchema 实例（即 makeExecutableSchema 返回的内容）和您的 resolvers 对象，您可以自己检查一下。这样的事情应该有效：

const { isObjectType, isWrappingType, isLeafType } = require('graphql')

assertAllResolversDefined (schema, resolvers) {
  // Loop through all the types in the schema
  const typeMap = schema.getTypeMap()
  for (const typeName in typeMap) {
    const type = schema.getType(typeName)
    // We only care about ObjectTypes
    // Note: this will include Query, Mutation and Subscription
    if (isObjectType(type) && !typeName.startsWith('__')) {
      // Now loop through all the fields in the object
      const fieldMap = type.getFields()
      for (const fieldName in fieldMap) {
        const field = fieldMap[fieldName]
        let fieldType = field.type

        // "Unwrap" the type in case it's a list or non-null
        while (isWrappingType(fieldType)) {
          fieldType = fieldType.ofType
        }

        // Only check fields that don't return scalars or enums
        // If you want to check *only* non-scalars, use isScalarType
        if (!isLeafType(fieldType)) {
          if (!resolvers[typeName]) {
            throw new Error(
              `Type ${typeName} in schema but not in resolvers map.`
            )
          }
          if (!resolvers[typeName][fieldName]) {
            throw new Error(
              `Field ${fieldName} of type ${typeName} in schema but not in resolvers map.`
            )
          }
        }
      }
    }
  }
}

检查缺少的解析器

check for missing resolvers

graphql

graphql-js

apollo-server

graphql-tools