Question

<apex:outputField rendered="{!(WidgetType.contains('mywidget1'))}" />

When I do this I get an error…

Error: Unknown function WidgetType.contains. Check spelling

… even though the WidgetType returns a String!

It will let me do this though…

rendered=”{!(WidgetType == ‘mywidget1’)}”

Here is the property in the controller…

public String getWidgetType() {
    return Settings.getWidgetType();
}

Answer 1

Check out the CONTAINS function documentation (pasted below).

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Description

Compares two arguments of text and returns TRUE if the first argument contains the second argument. If not, returns FALSE.

The following example checks the content of a custom text field named Product_Type and returns “Parts” for any product with the word “part” in it. Otherwise, it returns “Service.”
{!IF(contains(opportunity.Product_Type__c, "part"), "Parts", "Service")}

This function is case sensitive so be sure your compare_text value has the correct capitalization.

Use

CONTAINS(text, compare_text) and replace text with the text that contains the value of compare_text.

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In your case, you would need to use it like this:

<apex:outputField rendered="{!(CONTAINS(WidgetType,'mywidget1'))}" />