使用 DataWeave 组合两个有效负载

Question

我是 MuleSoft 的新手，正在为 DataWeave 的场景苦苦挣扎。有人可以帮助我优化合并两个有效负载以获得所需输出的方法吗？ payload1 有字段，payload2 有这些字段的规则集； 我们需要为每个领域制定相应的规则；例如，'name' 字段需要与 'name' 规则合并，类似地，'roll' 字段需要与 'roll' 规则合并（它们可能是单个字段的多个规则）；等等：

数据：

有效载荷1 =

    [
        {
            "ID" : "1",
            "Name" : "ABC",
            "Roll" : 123,
            "Address" : "PQR-234",
            "Standard" : "5"
        },
        {
            "ID" : "2",
            "Name" : "PQR",
            "Roll" : 456,
            "Address" : "REC-678",
            "Standard" : "7"
        },.
        .
        .
    ]

有效载荷2 =

    [
        {
            "field" : "Name",
            "field-Type": "String",
            "operator": "Not-In-List" ,
            "condition-Operand-Type": "",
            "error-Message": "Name - Invalid Value: Name not found in the list."
        },
        {
            "field" : "Name",
            "field-Type": "String",
            "operator": "invalid" ,
            "condition-Operand-Type": "",
            "error-Message": "Name - Invalid Value: There cannot be special char in a name."
        },
        {
            "field" : "Roll",
            "field-Type": "String",
            "operator": "Not-In-List" ,
            "condition-Operand-Type": "",
            "error-Message": "Roll - Invalid Value: Roll not found in the list."
        },
        {
            "field" : "Address",
            "field-Type": "String",
            "operator": "Not-In-List" ,
            "condition-Operand-Type": "",
            "error-Message": "Address - Invalid Value: Address not found in the list."
        },
        .
        .
        .
    ]

期望的输出：

    [
        {
            "ID" : "1",
            "Name" : "ABC",
            "data-Quality-Rule" : 
            {
                "field" : "ABC",
                "field-Type": "String",
                "operator": "Not-In-List" ,
                "condition-Operand-Type": "",
                "error-Message": "Name - Invalid Value: Name not found in the list."
            }
        },
        {
            "ID" : "1",
            "Name" : "ABC",
            "data-Quality-Rule" : 
            {
                "field" : "ABC",
                "field-Type": "String",
                "operator": "invalid" ,
                "condition-Operand-Type": "",
                "error-Message": "Name - Invalid Value: There cannot be special char in a name."
            }
        },
        {
            "ID" : "1",
            "Roll" : "123",
            "data-Quality-Rule" : 
            {
                "field" : "123",
                "field-Type": "String",
                "operator": "Not-In-List" ,
                "condition-Operand-Type": "",
                "error-Message": "Roll - Invalid Value: Roll not found in the list."
            }
        },
        .
        .
        .
        
    ]

Answer 1

首先使用键过滤适用于有效负载上每个元素的规则列表。我使用了 namesOf() 但也可以使用 pluck() 来完成。然后使用列表中每个项目的规则列表来映射输出，而不是尝试在原始有效负载上执行此操作。并使用 flatMap() 代替 map() 来消除每一步嵌套列表的不便。

脚本：

%dw 2.0
output application/json
fun applyRules(p, r)=
    namesOf(p) flatMap ((keyName, order) -> rules filter ($.field == keyName as String))
---
payload flatMap ((item, order) -> 
    applyRules(item, vars.rules) 
    map {
            ID: item.ID, 
            Name: item.Name, 
            "data-quality-rules": $
        }
    ) 

有效载荷：

[
    {
        "ID" : "1",
        "Name" : "ABC",
        "Roll" : 123,
        "Address" : "PQR-234",
        "Standard" : "5"
    },
    {
        "ID" : "2",
        "Name" : "PQR",
        "Roll" : 456,
        "Address" : "REC-678",
        "Standard" : "7"
    }
]

变量 vars.rules：

[
    {
        "field" : "Name",
        "field-Type": "String",
        "operator": "Not-In-List" ,
        "condition-Operand-Type": "",
        "error-Message": "Name - Invalid Value: Name not found in the list."
    },
    {
        "field" : "Name",
        "field-Type": "String",
        "operator": "invalid" ,
        "condition-Operand-Type": "",
        "error-Message": "Name - Invalid Value: There cannot be special char in a name."
    },
    {
        "field" : "Roll",
        "field-Type": "String",
        "operator": "Not-In-List" ,
        "condition-Operand-Type": "",
        "error-Message": "Roll - Invalid Value: Roll not found in the list."
    },
    {
        "field" : "Address",
        "field-Type": "String",
        "operator": "Not-In-List" ,
        "condition-Operand-Type": "",
        "error-Message": "Address - Invalid Value: Address not found in the list."
    }
]

输出：

[
  {
    "ID": "1",
    "Name": "ABC",
    "data-quality-rules": {
      "field": "Name",
      "field-Type": "String",
      "operator": "Not-In-List",
      "condition-Operand-Type": "",
      "error-Message": "Name - Invalid Value: Name not found in the list."
    }
  },
  {
    "ID": "1",
    "Name": "ABC",
    "data-quality-rules": {
      "field": "Name",
      "field-Type": "String",
      "operator": "invalid",
      "condition-Operand-Type": "",
      "error-Message": "Name - Invalid Value: There cannot be special char in a name."
    }
  },
  {
    "ID": "1",
    "Name": "ABC",
    "data-quality-rules": {
      "field": "Roll",
      "field-Type": "String",
      "operator": "Not-In-List",
      "condition-Operand-Type": "",
      "error-Message": "Roll - Invalid Value: Roll not found in the list."
    }
  },
  {
    "ID": "1",
    "Name": "ABC",
    "data-quality-rules": {
      "field": "Address",
      "field-Type": "String",
      "operator": "Not-In-List",
      "condition-Operand-Type": "",
      "error-Message": "Address - Invalid Value: Address not found in the list."
    }
  },
  {
    "ID": "2",
    "Name": "PQR",
    "data-quality-rules": {
      "field": "Name",
      "field-Type": "String",
      "operator": "Not-In-List",
      "condition-Operand-Type": "",
      "error-Message": "Name - Invalid Value: Name not found in the list."
    }
  },
  {
    "ID": "2",
    "Name": "PQR",
    "data-quality-rules": {
      "field": "Name",
      "field-Type": "String",
      "operator": "invalid",
      "condition-Operand-Type": "",
      "error-Message": "Name - Invalid Value: There cannot be special char in a name."
    }
  },
  {
    "ID": "2",
    "Name": "PQR",
    "data-quality-rules": {
      "field": "Roll",
      "field-Type": "String",
      "operator": "Not-In-List",
      "condition-Operand-Type": "",
      "error-Message": "Roll - Invalid Value: Roll not found in the list."
    }
  },
  {
    "ID": "2",
    "Name": "PQR",
    "data-quality-rules": {
      "field": "Address",
      "field-Type": "String",
      "operator": "Not-In-List",
      "condition-Operand-Type": "",
      "error-Message": "Address - Invalid Value: Address not found in the list."
    }
  }
]