How to create a custom field to store the value in JSON and rest api response as JSON too

[Ibrahim Kasim]

Data Saved:

Preview Data 

Expected output:

{ "region" : "india", "dev": "inhouse", "localPath": "D:\\s3-downloads\\", "Name" : "test-1.0.8.zip", "FolderLoc": "D:\\s3-downloads\\dev", "FileName": "D:\\s3-downloads\\dev\\Archive" }

Actual Output:

{
"content": [
{
"type": "paragraph",
"content": [
{
"type": "text",
"text": "{"
},
{
"type": "hardBreak"
},
{
"type": "text",
"text": "\"region\" : \"india\","
},
{
"type": "hardBreak"
},
{
"type": "text",
"text": "\"dev\": \"inhouse\","
},
{
"type": "hardBreak"
},
{
"type": "text",
"text": "\"localPath\": \"D:\\\\s3-downloads"
},
{
"type": "hardBreak"
},
{
"type": "text",
"text": "\","
},
{
"type": "hardBreak"
},
{
"type": "text",
"text": "\"Name\" : \"test-1.0.8.zip\","
},
{
"type": "hardBreak"
},
{
"type": "text",
"text": "\"FolderLoc\": \"D:\\\\s3-downloads"
},
{
"type": "hardBreak"
},
{
"type": "text",
"text": "dev\","
},
{
"type": "hardBreak"
},
{
"type": "text",
"text": "\"FileName\": \"D:\\\\s3-downloads\\\\dev"
},
{
"type": "hardBreak"
},
{
"type": "text",
"text": "Archive\""
},
{
"type": "hardBreak"
},
{
"type": "text",
"text": "}"
}
]
}
]
}

[Nic Brough -Adaptavist-]

The API already returns data in JSON format.

If you want to store as JSON, write JSON into a text field.  If you want plain text, stored as JSON, you'll need to write a new custom field type that can take input and reformat it as JSON, and return it in a viewable format that you prefer (noting that if that is JSON, the API will return JSON within JSON)

[Ibrahim Kasim]

Thanks, your suggestions has resolved the issue. But I got limitation over there, when am using custom text field, character limit is set to 255. 

If I make any changes in the limit of text fields, will impact existing custom text fields too.

How do I increase the limit only to specific fields?