Passing filter value to REST Query

Question

I have a text box that I'm trying to take the value from and pass it into a REST query as a filter parameter when the button is clicked. If I hard code a value into the REST query it retrieves the values as expected. If i try to pass the form field as a parameter, I get no results.

Form:

Lawson ID: <input type="text" id="LawsonID" >
<input type="button" value="Execute Query" onclick="LoadInfo();" >

REST Query:

"/_api/Web/Lists/GetByTitle('Lv%20Inquiries')/items?/_api/Web/Lists/GetByTitle('Lv%20Inquiries')/items?$select=Title,Co_x002d_worker_x0020_Last_x0020,Co_x002d_worker_x0020_First_x002,Status,Status_x0020_Reason,Leave_x0020__x0023_,First_x0020_Day_x0020_of_x0020_W,Initial_x0020_Call_x002f_Contact,Restrictions_x0020_and_x002f_or_&$filter=(Title eq + 'LawsonID' + )&$top=5000"

Answer 1

It looks like you expect the value of an element, based on ID, to be referable in a query, which doesn't make much sense, at least not to me. Instead you need to get the value from the input, and build the query. There are several ways to do this, here is one:

var lawsonId = document.getElementById('LawsonID').value;
var query = "/_api/Web/Lists/GetByTitle('Lv%20Inquiries')/items?/_api/Web/Lists/GetByTitle('Lv%20Inquiries')/items?$select=Title,Co_x002d_worker_x0020_Last_x0020,Co_x002d_worker_x0020_First_x002,Status,Status_x0020_Reason,Leave_x0020__x0023_,First_x0020_Day_x0020_of_x0020_W,Initial_x0020_Call_x002f_Contact,Restrictions_x0020_and_x002f_or_&$filter=(Title eq '" + lawsonId + "')&$top=5000"