false 对于资源,将计算该资源中的表达式。

错误的 或者如果它是一个计算结果为 .

这种行为在资源迭代中是有问题的,因为资源中的表达式可能引用 copyIndex()

语言表达式属性数组索引“0”超出范围。。请看 https://aka.ms/arm-template-expressions 有关用法的详细信息。

请注意,我已经“黑客”了 count copy 对象如果是 0 (作为表达 length(variables('productsJArray')) 可能导致评估失败,模板验证失败,出现以下错误-

副本计数必须为正整数值,且不能超过“800”。

我觉得如果 计数 是 ,则不添加任何资源-但这是一个完全不同的主题!

{
    "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "apiManagementServiceName": {
            "type": "string",
            "metadata": {
                "description": "The name of the API Management instance."
            }
        },
        "productsJson": {
            "type": "string",
            "metadata": {
                "description": "A JSON representation of the Products to add."
            }
        }
    },
    "variables": {
        "productsJArray": "[json(parameters('productsJson'))]"
    },
    "resources": [
        {
            "condition": "[greater(length(variables('productsJArray')), 0)]",
            "type": "Microsoft.ApiManagement/service/products",
            "name": "[concat(parameters('apiManagementServiceName'), '/', variables('productsJArray')[copyIndex()].name)]",
            "apiVersion": "2018-06-01-preview",
            "properties": {
                "displayName": "[variables('productsJArray')[copyIndex()].displayName]",
                "description": "[variables('productsJArray')[copyIndex()].description]",
                "state": "[variables('productsJArray')[copyIndex()].state]",
                "subscriptionRequired": "[variables('productsJArray')[copyIndex()].subscriptionRequired]",
                "approvalRequired": "[variables('productsJArray')[copyIndex()].approvalRequired]"
            },
            "copy": {
                "name": "productscopy",
                "count": "[if(greater(length(variables('productsJArray')), 0), length(variables('productsJArray')), 1)]"
            }
        }
    ]
}

将工作的示例参数文件

请注意,虽然这看起来很好,但在某些情况下 productsJson [] ,这就是我的问题所在。

{
        "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentParameters.json#",
        "contentVersion": "1.0.0.0",
        "parameters": {
                "apiManagementServiceName": {
                        "value": "my-api-management"
                },
                "productsJson": {
                        "value": "[{\"name\":\"my-product\",\"displayName\":\"My Product\",\"description\":\"My product is awesome.\",\"state\":\"published\",\"subscriptionRequired\":true,\"approvalRequired\":false}]"
                }
        }
}

将失败的示例参数文件

{
        "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentParameters.json#",
        "contentVersion": "1.0.0.0",
        "parameters": {
                "apiManagementServiceName": {
                        "value": "lmk-bvt-conveyorbot"
                },
                "productsJson": {
                        "value": "[]"
                }
        }
}

源自用户“4c74356b41”的建议之一。

此模板正在生成以下错误-

无法处理第“1”行和第“839”列的资源“/subscriptions/**************/resourceGroups/********/providers/Microsoft.Resources/deployments/api管理产品”的模板语言表达式此位置不需要模板函数“copyIndex”。该函数只能在指定了副本的资源中使用。

{
        "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
        "contentVersion": "1.0.0.0",
        "parameters": {
                "apiManagementServiceName": {
                        "type": "string",
                        "metadata": {
                                "description": "The name of the API Management instance."
                        }
                },
                "productsJson": {
                        "type": "string",
                        "metadata": {
                                "description": "A JSON representation of the Products to add."
                        }
                }
        },
        "variables": {
                "productsJArray": "[json(parameters('productsJson'))]"
        },
        "resources": [
                {
                        "condition": "[greater(length(variables('productsJArray')), 0)]",
                        "type": "Microsoft.Resources/deployments",
                        "name": "api-management-products",
                        "apiVersion": "2017-05-10",
                        "properties": {
                                "mode": "Incremental",
                                "template": {
                                        "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
                                        "contentVersion": "1.0.0.0",
                                        "resources": [
                                                {
                                                        "type": "Microsoft.ApiManagement/service/products",
                                                        "name": "[concat(parameters('apiManagementServiceName'), '/', variables('productsJArray')[copyIndex('productscopy')].name)]",
                                                        "apiVersion": "2018-06-01-preview",
                                                        "properties": {
                                                                "displayName": "[variables('productsJArray')[copyIndex('productscopy')].displayName]",
                                                                "description": "[variables('productsJArray')[copyIndex('productscopy')].description]",
                                                                "state": "[variables('productsJArray')[copyIndex('productscopy')].state]",
                                                                "subscriptionRequired": "[variables('productsJArray')[copyIndex('productscopy')].subscriptionRequired]",
                                                                "approvalRequired": "[variables('productsJArray')[copyIndex('productscopy')].approvalRequired]"
                                                        },
                                                        "copy": {
                                                                "name": "productscopy",
                                                                "count": "[if(greater(length(variables('productsJArray')), 0), length(variables('productsJArray')), 1)]"
                                                        }
                                                }
                                        ]
                                }
                        }
                }
        ]
}