Case insensitive filter

It would be nice if the ODataModel filter would support case insensitive filtering besides the current default filtering. When this case insensitive filtering would be used, instead of e.g.

People?$filter=substringof(%27Smith%27,FullName)

The following filter would be used:

People?$filter=substringof(tolower(%27Smith%27),tolower(FullName))

You could think of e.g. implementing this using an additional set of operators, perhaps pre- or postfixed with an “I” to indicate they’re case-insensitive:

var filter = new Filter("FullName", FilterOperator.ContainsI, "smith");

and

var filter = new Filter("FullName", FilterOperator.EQI, "smith");

[Michadelic]

Hello Jan,

good idea, it has been requested a lot of times already and it seems to be a missing feature in the odata specification. While we could add new filter operators in the odata model itself, the standard would not support it.

There are two very common workarounds:

• apply str.toLower() on the client
• implement the filter operation on the backend side case-insensitive

See also typical posts about this on goolge: https://www.google.de/search?q=odata+case+insensitive+search&oq=odata+case+insen&aqs=chrome.2.69i57j0l5.4601j0j1&sourceid=chrome&ie=UTF-8

Nevertheless i will forward your request to the OData experts so that they can take your enhancement as input and follow up with you.

Kind Regards, Michael

[StErMi]

Hi @gregorwolf I can confirm that with our actual project we’re folliwing that example.

Here’s how to create the filter

createFilter: function(key, value, operator, useToLower) {
	return new Filter(useToLower ? "tolower(" + key + ")" : key, operator, useToLower ? "'" + value.toLowerCase() + "'" : value)
},