[SalesForce] Conditionally render an

All,

I am trying to create a visual display of a list of contacts that are considered "High" influence. There is a pick-list field within the contact object that can be set to this value. I am using apex:repeat to create the list and would like to use "rendered =" to filter out the unimportant contacts.

              <apex:repeat value="{!Account.Contacts}" var="con" rows="6">
                    <tr>
                        <td class = "entry"><apex:outputField value="{!con.Name}" rendered=" {!con.Influence__c = 'High'}" styleClass="entry"/></td>
                        <td class = "entry"><apex:outputField value="{!con.Title}" rendered=" {!con.Influence__c = 'High'}"/></td>
                        <td class = "entry"><apex:outputField value="{!con.Owner.Name}" rendered=" {!con.Influence__c = 'High'}"/></td>
                    </tr>
                </apex:repeat>

For some reason it displays no values, even though I know there to be some. When I remove the "rendered" attribute, it works.

I appreciate any help that can be given.

Best Answer

You can use <apex:dataTable tag to get the required output . You can put the rendered attribute for each column based on your condition. Hope this helps.

<apex:page showHeader="true" sidebar="true" standardController="Account" tabStyle="Account">
    <apex:dataTable value="{!Account.Contacts}" var="con" cellPadding="4" border="1">
        <apex:column value="{!con.FirstName}" rendered="{!con.Influence__c=='High'}"/>
        <apex:column value="{!con.LastName}" rendered="{!con.Influence__c=='High'}"/>
        <apex:column value="{!con.Phone}" rendered="{!con.Influence__c=='High'}"/>
        <apex:column value="{!con.Email}" rendered="{!con.Influence__c=='High'}"/>
    </apex:dataTable>
</apex:page>

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I've answered a similar question some time ago: Add more than 1000 picklist values in visualforce page (controller 1000 list items limit)

You should ask yourself how usable it'll be to display over 1000 records? This suggests it's going to be a dashboard component - that'd be pretty long one...

Your "proper" options:

If it's a readonly display of data then mark the <apex:page readonly="true"> and the limit will go to 10K.
If it's acceptable for you to display some kind of pagination then you should read up on how to use StandardSetController for example.
You could build a listview in that objects tab that meets the filter criteria (Use formula field like in How to create a list view the returns all the records related to a current user? to implement the filter on the Buyer_lookup__c). Once you have that you can simply throw the <apex:enhancedList> at the page, no apex code required, no unit tests to write...
If it's really to be a dashboard component - why not simply build a report?

Your "subprime" ;) option (because even if you'll manage to get it to work you'll hit limits like viewstate or the one you've quoted: "Response size exceeded 15MB") would be to create a List<List<NRProducts__c>> and have 2 nested <apex:repeat>s.

It could look similar to that (I have 36 Opportunities in my Developer Edition):

enter image description here

public class ListLimitWorkaround{
    public ListLimitWorkaround(){}

    public List<List<Opportunity>> getChunkedRecords(){
        Integer sizeLimit = 5;    // flip to 1000
        List<List<Opportunity>> opps = new List<List<Opportunity>>();

        List<Opportunity> temp = new List<Opportunity>();
        for(Opportunity o : [SELECT Id, Name FROM Opportunity]){
            temp.add(o);
            if(temp.size() == sizeLimit){    // limit reached? Then add our current workaround list and spawn new one
                opps.add(temp);
                temp = new List<Opportunity>();
            }
        }
        // We've left the loop? We should check if there are any leftovers in 'temp' that still have to be added
        if(!temp.isEmpty()){
            opps.add(temp);
        }
        return opps;
    }
}

<apex:page controller="ListLimitWorkaround">

<div style="width:50%;float:left;">
    <ol>
        <apex:repeat value="{!chunkedRecords}" var="chunk">
            <apex:repeat value="{!chunk}" var="opp">
                <li>{!opp.Name}</li>
            </apex:repeat>
        </apex:repeat>
    </ol>
</div>
<div style="width:50%;float:left;">
    <ol>
        <apex:repeat value="{!chunkedRecords}" var="chunk">
            <li><ol>
                <apex:repeat value="{!chunk}" var="opp">
                    <li>{!opp.Name}</li>
                </apex:repeat>
            </ol></li>
        </apex:repeat>
    </ol>
</div>
</apex:page>

Best Answer

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