Question

我在缓存中有数据，即objectstore。我需要从缓存中获取数据并在其上应用过滤条件。

这里要求是，我必须公开api以获取基于filedName和filedValue的数据，这将在请求中动态生成。

样品申请：

https://localhost:8082/api/customer/filter?fieldName=customerId&fieldValue=101810

我有返回代码来过滤dataweave中的数据，但它无法正常工作。你能帮忙吗

%dw 1.0
%output application/json
---
payload.rows filter (("$.content." ++ flowVars.fieldName ++ ".content") as :string == flowVars.fieldValue as :string) map ((row , indexOfRow) -> {
    customerId: row.content.customerId.content as :string when row.content.customerId.content != null otherwise null,
    customerName: row.content.customerName.content as :string when row.content.customerName.content != null otherwise null,
    customerAddress:row.content.customerAddress.content as :string when row.content.customerAddress.content != null otherwise null
})

我的错误

Exception while executing: 
payload.rows filter (("$.content." ++ flowVars.fieldName ++ ".content") as :string == flowVars.fieldValue as :string) map ((row , indexOfRow) -> {
                      ^
Type mismatch for '++' operator
     found :object, :string
  required :string, :string.

你能帮忙解决这个问题吗？

Answer 1

问题在于用于选择器的代码应该像$.content[flowVars.fieldName].content。完整的代码将是

%dw 1.0
%output application/json
---
payload.rows filter (($.content[flowVars.fieldName].content) as :string == flowVars.fieldValue as :string) map ((row , indexOfRow) -> {
    customerId: row.content.customerId.content as :string when row.content.customerId.content != null otherwise null,
    customerName: row.content.customerName.content as :string when row.content.customerName.content != null otherwise null,
    customerAddress:row.content.customerAddress.content as :string when row.content.customerAddress.content != null otherwise null
})

这对您提供的输入工作正常。

希望得到这个帮助。

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