[SalesForce] Visualforce dynamic Ids assignment

I am trying to work on component. Currently, I have this as the structure:

<apex:pageBlock title="Document">
                <apex:pageBlockTable value="{!documents}" var="doc">
                    <apex:column headervalue="Name">
                        <apex:outputLink value="/servlet/servlet.FileDownload?file={!doc.id}">{!doc.name}.{!doc.Type}</apex:outputLink>
                    </apex:column>
                    <apex:column value="{!doc.Description}"/>                  
                </apex:pageBlockTable> 
            </apex:pageBlock>

I would like to add a new column to this table, "Job Status".

<apex:column headervalue="Job status"> 
                            <apex:outputText id="{!doc.id}"></apex:outputtext>
                        </apex:column>

This throws an error stating that id requires a literal value. I intend to use this id to peg the job status with the current document. However, I have run into this issue and seems I will not be able to track this info from the apex class. What other ways that I can add an additional column that has no information to deal with the page table variable?

Best Answer

The "id" attribute for any element with a "managed" XML namespace (e.g. apex:outputText, c:myComponent, etc), can never use non-literal values. This is because these id values must be unique and may be referenced from other locations, such as reRender targets or the $Component global variable. Instead, simply use a normal span tag, such as: <span id="{!doc.id}"></span>.

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[SalesForce] Dynamic Search Using Visualforce Page

A good way to test this is to look at the generated debug SOQL at the bottom of the page and then run it in SOQL Xplorer or something. This will give you a good indication what is going on under the hood. For instance, when I entered 60 into the Amount field, the generated SOQL is:

select name, accountid, amount, closedate, forecastcategoryname, ownerid from opportunity where accountid != null and amount LIKE '60%' order by closedate desc limit 25

Since amount is a numeric field, and amount LIKE '60%' order is not going to work. You are constructing the SOQL as string values when some are numeric and dates. For instance, your amount section:

if (!amount.equals(''))
    soql += ' and amount LIKE \''+String.escapeSingleQuotes(amount)+'%\'';

Should look something like:

if (!amount.equals(''))
    soql += ' and amount > '+amount+''';

[SalesForce] Visualforce dynamic binding

when you access the standardSetController records collection you get back an sObject array.. and when you bind that to pageblock table, you will be iterating over sObject at a time... and the only field you can access from a generic sObject is Id..

reference https://www.salesforce.com/us/developer/docs/apexcode/Content/langCon_apex_SObjects_accessing_fields.htm

If you use the generic sObject type instead of a specific object, such as Account, you can retrieve only the Id field using dot notation. You can set the Id field for Apex code saved using Salesforce.com API version 27.0 and later). Alternatively, you can use the generic sObject put and get methods.

to access any other fields of the sObject you need to do the typecasting..

to test that, if you change the apex column value to display the Id, it should work..

<apex:page controller="mycontroller">
    <apex:pageBlock >
        <apex:pageblocktable value="{!sc2.records}" var="test">
            <apex:column value="{!test.Id}"></apex:column>
        </apex:pageblocktable>
    </apex:pageBlock>
</apex:page>

but based on the dynamic visualforce syntax to retrieve the fields from sObject, your syntax looks perfectly fine and it should work..

when i tried your code without the headerValue attribute it works perfectly fine.. and when i add the headerValue attribute back it results in the same error.

final code that worked for me

<apex:page controller="mycontroller">
    <apex:pageBlock >
        <apex:pageblocktable value="{!sc2.records}" var="test">
            <apex:column value="{!test['Name']}"></apex:column>
        </apex:pageblocktable>
    </apex:pageBlock>
</apex:page>

Best Answer

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