How can I update multiple items with a shared customer number on a sharepoint list with AJAX?

I am trying to update a sp list with the following javascript/ajax. It succeeds until it gets to the ajax function, which is where it fails. It says the ItemID is not defined, when it is defined as: 

var ItemId=item.ID

Any help appreciated.

What I'm trying to do:

I am trying to update all records in a list where the cust_number (a column in the list) field is 17 so that assign (another column) = "testinput".

eg:

Cust Number| Assign

17 | testinput

1 |

17 | testinput

Solved

I'm afraid you made a simple typo.

On a certain point in your code you declare the following:

var itemId = item.ID;

Later on you try to acces that same variable

url:_spPageContextInfo.siteAbsoluteUrl + "/_api/web/lists/getbytitle('" + listName + "')/items('" + ItemId + "')",

However itemId != ItemId

Javascript is case sensitive.


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