FieldId not returned in changelog

[Archana Singh]

We are using Jira Rest Apis to fetch issues and related changeLog for the issue. Please refer to the attached response. We have noticed that sometimes fieldId is not returned under changelog >histories>items->. My request looks like below -
https://jira.infusionsoft.com:443/rest/api/2/search?fields=%2Aall&expand=changelog%2CversionedRepresentations

Also what's the difference between field and fieldId? Is the value suppose to be same in both the fields?

Also am not referring to custom field, I have seen fieldId not returned for Description field (every issue has this field). 

Check the response below 

```

"startAt" : 0,
"histories" : [
{
"id" : "1016529",
"items" : [
{
"fieldtype" : "jira",

"from" : null,

"to" : null,
"fromString" : "Custom Statistics Widget Calculates first 10k rows only",

"toString" : "Custom Statistics Widget",

"field" : "description"
}
],

```

[Nic Brough -Adaptavist-]

The field id for Description is "description".  Only custom fields have numeric field ids, and those are their unique immutable number in the database.  "Field" usually means "current name of the field" (which can be changed)

[Archana Singh]

Thank you so much for replying. Do you know why fieldId is not returned sometimes? Also for standard fields like "Description" is the fieldId always same as the field?

[Nic Brough -Adaptavist-]

You've not shown an example of it not appearing.  Maybe your post asks not to get it.

[Archana Singh]

Check the response above( pasting here as well)- 

{
"fieldtype" : "jira",
"from" : null,
"to" : null,
"fromString" : "Custom Statistics Widget Calculates first 10k rows only",
"toString" : "Custom Statistics Widget",
"field" : "description"
}

[Archana Singh]

I want the fieldId in response.

[Nic Brough -Adaptavist-]

That has the field id in it.  As I said before, it's "description" in this case.

[Archana Singh]

Isn't it confusing, the response should have a fieldId field, something like below -

{
"fieldtype" : "jira",
"from" : null,
"to" : null,
"fromString" : "Custom Statistics Widget Calculates first 10k rows only",
"toString" : "Custom Statistics Widget",
"field" : "description",

"fieldId":"description",

}

How the enduser will come to know field is containing fieldId ?

[Nic Brough -Adaptavist-]

Sorry, I was totally unclear, the "field" contains the field id here.

[Archana Singh]

Do you mean to say that if the "fieldId" then "field" contains the fieldId? 

[Nic Brough -Adaptavist-]

No "if", it's simply that "field" contains the field id. 

Note that in your results, it says "field" : "description".  As I said before, "description" is the field id of the field called "Description" in English - note the capitalisation in there - Description is the name, description is the field id.

[Archana Singh]

Do you mean to say whenever `fieldName` is same as `fieldId` , we just get `field` in response (as for Description). And, lets say I have another field "Title" with fieldId "tId" and fieldName as "Title", will I get  response like below -

{
"fieldtype" : "jira",
"from" : null,
"to" : null,
"fromString" : "AAAAA",
"toString" : "BBB",

"field" : "title",

"fieldId":"tId",

}

[Nic Brough -Adaptavist-]

No.

You will get the data

Field: field id