I've tried the filter query solution first but I am getting error messages as a result.
All the project phases i want to filter for coincidentally include the letter t, so I've been trying:
substringof(Current_x0020_Phase, 't')
{
"status": 400,
"message": "An unknown function with name 'substringof' was found. This may also be a function import or a key lookup on a navigation property, which is not allowed.\r\n inner exception: An unknown function with name 'substringof' was found. This may also be a function import or a key lookup on a navigation property, which is not allowed.\r\nclientRequestId: 12948adb-a95b-4481-a645-7e6260456f27",
"source": "excelonline-ase.azconn-ase.p.azurewebsites.net"
}and variations of this as posted in the link provided. This doesnt seem to work.
Edit. Also no luck using
Project_x0020_Reference NE '' or Project_x0020_Reference NE 'Closed'
{
"status": 400,
"message": "Invalid filter clause: unsupported operation. Only single 'eq', 'ne', 'contains', 'startswith' or 'endswith' is currently supported.\r\nclientRequestId: 41cc9017-7078-4849-bf0a-7ebc3abd9cb5",
"source": "excelonline-ase.azconn-ase.p.azurewebsites.net"
}