I have a visualforce page that uses various components to try to print data from a list of custom objects. The idea is that it will display a list of types of relationships and then if clicked it will display the names of people who have that type of relationship.

In my controller I have a:

Map<String, List<Relationship_Detail__c>> typeToRelationships

where it takes the relationship type as the key and gives back all of the custom objects with that type.

<apex:repeat value="{!typeToRelationships}" var="relationshipType" rendered="{!IF(sortedByType==true, true, false)}">
    <apex:commandLink action="{!relationshipTypeClicked}" rerender="relationsWithType">
        <apex:outputText value="{!relationshipType} ({!typeToNumberOfRelationships[relationshipType]})"/>
        <apex:param name="relationType" value="{!relationshipType}" assignTo="{!selectedType}"/>
        <apex:param name="idOfViewer" value="{!contact.Id}" assignTo="{!selectedIDForType}"/>
    <apex:outputPanel id="relationsWithType" >
        <apex:dataList value="{!typeToRelationships[relationshipType]}" var="relation" rendered="{!IF(rendered[relationshipType]==true, true, false)}">
            <apex:commandLink action="{!relationDetailClicked}">
                various outputTexts

I want to modify it so that the string is the relationship type + the id of the contact page I am currently on.

The issue in doing that is with the dataList in the middle of the given code which renders based on a Map<String, Boolean> called rendered, which takes the same key and spits out true or false.

The code used rendered={!IF(rendered[relationshipType]... for the dataList but now I want to do something like this:


Is this possible? Or is there a way to have the rendered attribute call a function with those parameters which would return true or false?


It isn't possible to pass parameters to a controller method binding in a Visualforce page. From Controller Methods:

Visualforce markup can use the following types of controller extension and custom controller methods:

  • Action
  • Getter
  • Setter

You could rework typeToRelationships so that the keys already contain concatenated relationshipType and contact.Id.

Alternatively, you could put the apex:dataList into an apex:component. The component can have multiple apex:attributes defined. This will allow you to pass multiple parameters in.

One small personal crusade. The following is perfectly valid. However, it does contain a large amount of redundancy.

rendered="{!IF(sortedByType==true, true, false)}"

Instead, consider:


There is no need to compare a boolean to another boolean or wrap it in an IF statement.

  • Thank you very much and thank you for catching that redundancy. I will certainly look into the apex:component Jun 30 '14 at 12:28

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.