CSV2JSON

README

CSV2JSON

Convert CSV to automatically nested JSON in Golang.

This project transforms CSV to JSON without struct and allows recreating nested object using delimiters.
The Reason for this tool is I looked for golang examples but found most of it using struct, so I built this to be flexible enough for any file.

Table of Contents

• Usage
• Examples
  • Basic
  • Nested
    • Object
    • Array Object
    • Multi-Level Object
    • Multi-level Array with Internal Object
• License

How to use this tool:

• After Downloading the go file you can run go run main.go -path={path to csv file} > {path to output json file}
  Example go run main.go -path=/tmp/data.csv > /tmp/output.json
• you will have a new file in the output location with JSON extension.

Example:

Basic Transformation

If I have a csv file contains a test data test.csv:

Id,Name,Age
1,Aditya,26
2,Raj,22

and we need to convert it to json file:

go run main.go -path=/tmp/test.csv > /tmp/output.json

after writing this command you will get another file in the tmp directory called output.json with the data in the new format:

[
  {
    "Age":"26",
    "Id":"1",
    "Name":"Aditya"
  },
  {
    "Age":"22",
    "Id":"2",
    "Name":"Raj"
  }
]

and that's it for basic transformation.

Nested Transformation

Object

If I have a csv file contains a test data with employee information as internal object test.csv:

id,employee.name,employee.age
1,Aditya,26
2,Raj,22

and we need to convert it to json file:

go run main.go -path=/tmp/test.csv > /tmp/output.json

after writing this command you will get another file in the tmp directory called output.json with the data in the new format:

[
   {
      "employee":{
         "age":"26",
         "name":"Aditya"
      },
      "id":"1"
   },
   {
      "employee":{
         "age":"22",
         "name":"Raj"
      },
      "id":"2"
   }
]

Array Object

If I have a csv file contains a test data with info as array test.csv:

id,employee.name,employee.age,employee.info[0],employee.info[1],employee.info[2]
1,Aditya,26,--AdditionalInfo1--,--AdditionalInfo2--,--AdditionalInfo3--
2,Raj,22,--Info1--,--Info2--,--Info3--

and we need to convert it to json file:

go run main.go -path=/tmp/test.csv > /tmp/output.json

after writing this command you will get another file in the tmp directory called output.json with the data in the new format:

[
   {
      "employee":{
         "age":"26",
         "info":[
            "--AdditionalInfo1--",
            "--AdditionalInfo2--",
            "--AdditionalInfo3--"
         ],
         "name":"Aditya"
      },
      "id":"1"
   },
   {
      "employee":{
         "age":"22",
         "info":[
            "--Info1--",
            "--Info2--",
            "--Info3--"
         ],
         "name":"Raj"
      },
      "id":"2"
   }
]

Multi-level Object

If I have a csv file contains a test data with multi-level object test.csv:

id,employee.name.firstname,employee.name.lastname,employee.age,employee.info[0],employee.info[1],employee.info[2]
1,Aditya,Raj,26,--AdditionalInfo1--,--AdditionalInfo2--,--AdditionalInfo3--
2,Raj,Aditya,22,--Info1--,--Info2--,--Info3--

and we need to convert it to json file:

go run main.go -path=/tmp/test.csv > /tmp/output.json

after writing this command you will get another file in the tmp directory called output.json with the data in the new format:

[
   {
      "employee":{
         "age":"26",
         "info":[
            "--AdditionalInfo1--",
            "--AdditionalInfo2--",
            "--AdditionalInfo3--"
         ],
         "name":{
            "firstname":"Aditya",
            "lastname":"Raj"
         }
      },
      "id":"1"
   },
   {
      "employee":{
         "age":"22",
         "info":[
            "--Info1--",
            "--Info2--",
            "--Info3--"
         ],
         "name":{
            "firstname":"Raj",
            "lastname":"Aditya"
         }
      },
      "id":"2"
   }
]

Multi-level Array with internal objects

If I have a csv file contains a test data with multi-level object with arrays test.csv:

id,employee.name.firstname,employee.name.lastname,employee.age,employee.info[0].title,employee.info[0].content,employee.info[1].title,employee.info[1].content
1,Aditya,Raj,26,--AdditionalInfoTitle1--,InfoContent1,--AdditionalInfo2--,InfoContent2
2,Raj,Aditya,22,--Info1--,--Content1--,--Info2--,--Content2--

and we need to convert it to json file:

go run main.go -path=/tmp/test.csv > /tmp/output.json

after writing this command you will get another file in the tmp directory called output.json with the data in the new format:

[
   {
      "employee":{
         "age":"26",
         "info":[
            {
               "content":"InfoContent1",
               "title":"--AdditionalInfoTitle1--"
            },
            {
               "content":"InfoContent2",
               "title":"--AdditionalInfo2--"
            }
         ],
         "name":{
            "firstname":"Aditya",
            "lastname":"Raj"
         }
      },
      "id":"1"
   },
   {
      "employee":{
         "age":"22",
         "info":[
            {
               "content":"--Content1--",
               "title":"--Info1--"
            },
            {
               "content":"--Content2--",
               "title":"--Info2--"
            }
         ],
         "name":{
            "firstname":"Raj",
            "lastname":"Aditya"
         }
      },
      "id":"2"
   }
]

License:

The MIT License