如何使用Logic App tolower（）函数

Question

使用下面的代码作为示例（会有更多的结果），我正在构造一个if true / false语句，将输入作为大写或小写。我不确定如何利用tolower（）函数来强制输入始终为语句的小写。

[
    {
        "VM":  "MyVM1",
        "Success":  true,
        "PSComputerName":  "localhost",
        "PSShowComputerName":  true,
        "PSSourceJobInstanceId":  "5e18cd92-5676-4ed6-a7e4-14b0d9fea3b3"
    },
    {
        "VM":  "MyVM2",
        "Success":  true,
        "PSComputerName":  "localhost",
        "PSShowComputerName":  true,
        "PSSourceJobInstanceId":  "5e18cd92-5676-4ed6-a7e4-14b0d9fea3b3"
    }
]

我的逻辑应用流程：

我首选的逻辑应用程序流程更改：

如您所见，我尝试使用以下条件：

@contains(tolower(items('For_each')['VM'], 'myvm1'))

但是，当运行逻辑应用程序时，我会看到以下错误输出：

InvalidTemplate。无法处理第1行和第2179行的“条件”操作的模板语言表达式：'模板语言函数'tolower'需要一个参数：要转换为下限的字符串。使用'2'参数调用该函数。有关使用详情，请参阅https://aka.ms/logicexpressions#toLower。'。

https://docs.microsoft.com/en-us/azure/logic-apps/logic-apps-workflow-definition-language

我查看了文档，但遗憾的是我不太了解如何编辑此查询。任何帮助都会非常感激

Answer 1

所以...错误是正确的。你当前的表达

@contains（tolower（items（'For_each'）['VM']，'myvm1'））

将两个参数传递给tolower（）

@contains（tolower（items（'For_each'）['VM']，'myvm1'））

items（'For_each'）['VM'] - 和 - 'myvm1'

也许你真的想要

@contains（tolower（items（'For_each'）['VM']），'myvm1'）

Answer 2

来自@ John-305的答案是正确的。你的陈述有问题。正确的陈述是：

“@contains（tolower（items（'For_each'）['VM']），'myvm1'）”

试试这个逻辑应用程序参考：

{
    "definition": {
        "$schema": "https://schema.management.azure.com/providers/Microsoft.Logic/schemas/2016-06-01/workflowdefinition.json#",
        "actions": {
            "For_each": {
                "actions": {
                    "Condition": {
                        "actions": {
                            "Append_to_array_variable": {
                                "inputs": {
                                    "name": "result",
                                    "value": "@items('For_each')"
                                },
                                "runAfter": {},
                                "type": "AppendToArrayVariable"
                            }
                        },
                        "expression": "@contains(tolower(items('For_each')['VM']), 'myvm1')",
                        "runAfter": {},
                        "type": "If"
                    }
                },
                "foreach": "@body('Parse_JSON')",
                "runAfter": {
                    "Initialize_variable": [
                        "Succeeded"
                    ]
                },
                "type": "Foreach"
            },
            "Initialize_variable": {
                "inputs": {
                    "variables": [
                        {
                            "name": "result",
                            "type": "Array"
                        }
                    ]
                },
                "runAfter": {
                    "Parse_JSON": [
                        "Succeeded"
                    ]
                },
                "type": "InitializeVariable"
            },
            "Parse_JSON": {
                "inputs": {
                    "content": [
                        {
                            "PSComputerName": "localhost",
                            "PSShowComputerName": true,
                            "PSSourceJobInstanceId": "5e18cd92-5676-4ed6-a7e4-14b0d9fea3b3",
                            "Success": true,
                            "VM": "MyVM1"
                        },
                        {
                            "PSComputerName": "localhost",
                            "PSShowComputerName": true,
                            "PSSourceJobInstanceId": "5e18cd92-5676-4ed6-a7e4-14b0d9fea3b3",
                            "Success": true,
                            "VM": "MyVM2"
                        }
                    ],
                    "schema": {
                        "items": {
                            "properties": {
                                "PSComputerName": {
                                    "type": "string"
                                },
                                "PSShowComputerName": {
                                    "type": "boolean"
                                },
                                "PSSourceJobInstanceId": {
                                    "type": "string"
                                },
                                "Success": {
                                    "type": "boolean"
                                },
                                "VM": {
                                    "type": "string"
                                }
                            },
                            "required": [
                                "VM",
                                "Success",
                                "PSComputerName",
                                "PSShowComputerName",
                                "PSSourceJobInstanceId"
                            ],
                            "type": "object"
                        },
                        "type": "array"
                    }
                },
                "runAfter": {},
                "type": "ParseJson"
            },
            "Response": {
                "inputs": {
                    "body": "@variables('result')",
                    "statusCode": 200
                },
                "runAfter": {
                    "For_each": [
                        "Succeeded"
                    ]
                },
                "type": "Response"
            }
        },
        "contentVersion": "1.0.0.0",
        "outputs": {},
        "parameters": {},
        "triggers": {
            "manual": {
                "inputs": {
                    "schema": {}
                },
                "kind": "Http",
                "type": "Request"
            }
        }
    }
}