Azure 数据工厂复制活动动态映射错误：语法错误：arguments 之间缺少逗号

Question

I am trying to convert json to csv and want to use dynamic mapping instead of manual mapping. I dynamic mapping I see an error message Syntax error: Missing comma between arguments

below is the json iam trying to add in dynamic content

{
            "type": "TabularTranslator",
            "mappings": [
                {
                    "source": {
                        "path": "$['longitude']"
                    },
                    "sink": {
                        "name": "longitude",
                        "type": "String"
                    }
                },
                {
                    "source": {
                        "path": "$['City']"
                    },
                    "sink": {
                        "name": "City",
                        "type": "String"
                    }
                },
                {
                    "source": {
                        "path": "$['temeprature']"
                    },
                    "sink": {
                        "name": "temeprature",
                        "type": "String"
                    }
                },
                {
                    "source": {
                        "path": "$['max']"
                    },
                    "sink": {
                        "name": "max",
                        "type": "String"
                    }
                },
                {
                    "source": {
                        "path": "$['speed']"
                    },
                    "sink": {
                        "name": "speed",
                        "type": "String"
                    }
                }
            ]
        }
    

See error message in this screenshot

Answer 1

The error is occurring because the incorrect format used to specify dynamic mapping. The following is a demonstration on the same.

• I got the same error when I used the JSON syntax that you have used for mapping columns dynamically ie, Syntax error: Missing comma between arguments .

• Since we are mapping the source columns (json) to destination (csv), we can specify the source in the mapping as "name": "longitude" . I considered only longitude column for this demonstration and the following is the JSON that I used for mapping:

@json('{
            "type": "TabularTranslator",
            "mappings": [
                {
                    "source": {
                        "name": "longitude"
                    },
                    "sink": {
                        "name": "longitude",
                        "type": "String"
                    }
                },
                {
                    "source": {
                        "name": "city"
                    },
                    "sink": {
                        "name": "city",
                        "type": "String"
                    }
                }
            ]
        }'
)

• When the pipeline is run, it successfully writes the input JSON file as a CSV (below is the image of my csv output).