Dynamic Visualforce Page with Standard Controller Pagination






Find myself writing similar page in several requirements - page that display records from specific objects, support pagination, filtering, sorting.


Thought that it's about time to take 1 of the pages I had and make it generic. To be rendered based on configuration.


How to do it?

1.Create new custom metadata for the configuration.



2.Create apex class

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public with sharing class SearchObjectController {

    public Search_Object_Setup__mdt searchPageSetup {get; set;}
    
    public list<FieldToShow> l_fields {get; set;}
    public list<FilterInPage> l_filters {get; set;}
    
    public String filterParamIds {get; set;}
    
    private String soql;
    private String soqlCtr {get;set;}
    
    public Integer ctrRecords {get;set;}
    Public Integer noOfRecords{get; set;}   // Number of total records in Query

    // the collection of contacts to display
    private list<sObject> l_records;

    private Integer pageSize;  
    private Integer totalRecords = 3000;
    
    public String pageTitle {get; set;}
    
    //set controller
    private ApexPages.StandardSetController setCon;     // standart set controller supporting pagination. CANNOT be Transietnt (results in Error)

    public  list<sObject> getl_records(){
        return this.setCon.getRecords();
    }
    
    public String sortDir { get; set; }
    public String sortField { get; set; }
    
    // toggles the sorting of query from asc<-->desc
    public void toggleSort() {
        // simply toggle the direction
        sortDir = sortDir.equals('asc NULLS FIRST ') ? 'desc NULLS LAST ' : 'asc NULLS FIRST ';
    
        runQuery();
    }
    
    // init the controller and display some initial data when the page loads
    public SearchObjectController () {

        //String searchObjectPageId = Apexpages.currentPage().getParameters().get('pId');
        String searchObjectName = Apexpages.currentPage().getParameters().get('pn');
        
        searchPageSetup = [ select DeveloperName,Page_Size__c,Page_Title__c,Fields_to_Display__c,Filters__c,Object_API_Name__c
                            from Search_Object_Setup__mdt
                            where DeveloperName = :searchObjectName];
        
        pageSize = searchPageSetup.Page_Size__c != null ? Integer.valueOf(searchPageSetup.Page_Size__c) : 20;
        pageTitle = searchPageSetup.Page_Title__c;
        l_fields = new list<FieldToShow>();
        l_filters = new list<FilterInPage>();
        
        //Get object schema
        Schema.SObjectType objSchema = Schema.getGlobalDescribe().get(searchPageSetup.Object_API_Name__c);
        
        filterParamIds = '';
        
        if(! String.isBlank(searchPageSetup.Filters__c)){
        
            Integer filterIndex = 1;
        
            for(String fieldFilter : searchPageSetup.Filters__c.split(',')){
                l_filters.add(new FilterInPage(fieldFilter, ('prmid_' + String.valueOf(filterIndex)), objSchema.getDescribe().fields.getMap().get(fieldFilter).getDescribe().getLabel()));
            
                filterParamIds += ('prmid_' + String.valueOf(filterIndex)) + ',';
                
                filterIndex++;
            }
        
            filterParamIds = filterParamIds.removeEnd(',');
        
        }
        
        soql = 'select ';
        for(String fieldAPI : searchPageSetup.Fields_to_Display__c.split(',')){
            soql += fieldAPI + ',';
            
            l_fields.add(new FieldToShow(fieldAPI, objSchema.getDescribe().fields.getMap().get(fieldAPI).getDescribe().getLabel()));
        }
        soql = soql.removeEnd(',');
        
        soql += ' from ' + searchPageSetup.Object_API_Name__c;
        
        soqlCtr = 'SELECT Count() from ' + searchPageSetup.Object_API_Name__c;
        
        sortField = 'Name';
        sortDir = 'desc NULLS LAST';
        
        runQuery();
    }
    
    //Runs the actual query, with parameters as set by the User
    public void runQuery() {

        try {
            System.debug(soql + ' order by ' + String.escapeSingleQuotes(sortField) + ' ' + String.escapeSingleQuotes(sortDir) + ' limit ' + totalRecords);
            l_records  = Database.query(soql + ' order by ' + String.escapeSingleQuotes(sortField) + ' ' + String.escapeSingleQuotes(sortDir) + ' limit ' + totalRecords);
            
            this.setCon= new ApexPages.StandardSetController(l_records);
            this.setCon.setpageNumber(1); // First page to display
            this.setCon.setPageSize(pageSize); // First chuck of 20 records to display
            noOfRecords = this.setCon.getResultSize(); // # records in the resulst set,, driven by limit and ViewState size

            ctrRecords = Database.countQuery(soqlCtr ); // Total number of records for the Query (no Limit used)
        } catch (Exception ex) {
            ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'Error during query: ' + ex.getMessage()));
        }
    }

    //Run the search with parameters passed via Javascript.
    //Invoked when user chnages seach criteria or page size on the page
    public PageReference runSearch() {
    
        System.debug('Run Search with params');
        
        soql = 'select ';
        for(FieldToShow  fieldPage : l_fields){
            soql += fieldPage.field + ',';
        }
        soql = soql.removeEnd(',');
        
        soql += ' from ' + searchPageSetup.Object_API_Name__c;
        
        String whereClause = ' where';
        
        String inputFilters = ApexPages.currentPage().getParameters().get('allInputParams');
        
        System.debug('inputFilters : ' + inputFilters );
        
        list<String> l_inputFilters = inputFilters.split(',');
        
        System.debug('l_inputFilters : ' + l_inputFilters );
        
        Integer index = 0;
        
        for(index = 0; index < l_filters.size() ; index ++) {
            
            if(l_inputFilters.size() > index){
                l_inputFilters.get(index);
        
                if(! String.isBlank(l_inputFilters.get(index))){
                    whereClause += (whereClause == ' where' ? ' ' : ' and') + ' ' + l_filters.get(index).field + ' LIKE \'%' + String.escapeSingleQuotes(l_inputFilters.get(index)) + '%\'';
                }
            }
        }
        
        if(whereClause != ' where'){
            soql += whereClause;
        }
           
        runQuery();

        return null;
    }
  
    //Advance to next page
    public void doNext(){
        if(this.setCon.getHasNext())
            this.setCon.next();
    }
    
    //Advance to previous page
    public void doPrevious(){
        if(this.setCon.getHasPrevious())
            this.setCon.previous();
    }
    //Get whether previous page exists
    public Boolean getHasPrevious(){
        return this.setCon.getHasPrevious();
    }
    
    
    //Get whether next page exists
    public Boolean getHasNext(){
        return this.setCon.getHasNext();

    }
    
    
    //Get page number
    public Integer getPageNumber(){
        return this.setCon.getPageNumber();
    }
    
    
    //Get total pages in the current Query
    Public Integer getTotalPages(){
    
        Decimal totalSize = this.setCon.getResultSize();
        Decimal pageSize = this.setCon.getPageSize();
        
        Decimal pages = totalSize/pageSize;
        
        return (Integer)pages.round(System.RoundingMode.CEILING);
    }
    
    //First page of pagination
    public void doFirst() {
        setCon.first();
    }
  
    //Last page of pagination
    public void doLast() {
        setCon.last();
    }

    public Integer getpageSize() {
        return pageSize;
    }
      
    //Invoked when the user change page size on page, viajs  doSeacrh() calling  runSearch()  
    public void setpageSize(Integer pageSize) {
        this.pageSize = integer.valueof(pageSize);
    }
    
    public class FieldToShow {
        public String field {get; set;}
        public String label {get; set;}
        
        public FieldToShow (String f, String l){
            field = f;
            label = l;
        }
    }
    
    public class FilterInPage{
        public String field {get; set;}
        public String paramId {get; set;}
        public String label {get; set;}
        
        public FilterInPage (String f, String p, String l){
            field = f;
            paramId = p;
            label = l;
        }
    }
}



3.Create Visualforce page

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<apex:page controller="SearchObjectController" sidebar="false">

<script type="text/javascript">


    var delayTimer;

    function doSearch() {
        // Invoked every time a key is pressed
        //### filter for real chars
        clearTimeout(delayTimer);   // clear timeout if less than 1000 msec passed, so we do not call for every key pressed
        
        var paramsIds = '{!filterParamIds}';
        var paramsList = paramsIds.split(',');
        
        var params = '';
        
        
        
        for(var i=0; i < paramsList.length; i++ ) {
            params += document.getElementById(paramsList[i]).value + ',';
        }
        
        //params = params.substring(0, params.length - 1);
        
        console.log('###' + params);
        
        delayTimer = setTimeout(function() {
            // if 1 sec passed with no keys pressed, invoke the backend  search
            // Do the ajax stuff 
            searchServer(params);
        }, 1000); // Will do the ajax stuff after 1000 ms, or 1 s
        
        
        
      }  //doSearch()
</script> 
<apex:form Id="theForm">
    <apex:pageMessages id="errors" />

    <apex:pageBlock title="{!pageTitle}" mode="edit">

        <table width="100%" border="0">
            <tr>  
                <td width="200" valign="top">

                    <apex:pageBlock title="Parameters" mode="edit" id="criteria">
                    
                        <table cellpadding="2" cellspacing="2">
                        
                            <apex:repeat value="{!l_filters}" var="filterInPage">
                                <tr>
                                    <td style="font-weight:bold;">{!filterInPage.label}<br/>
                                        <input type="text" id="{!filterInPage.paramId}" onkeyup="doSearch();"/>
                                    </td>
                                </tr>
                            </apex:repeat>
                                                        
                        </table>

                        <apex:actionStatus id="queryIndicator" >
                            <apex:facet name="start">             
                                <apex:image url="{!$Resource.LoadingProgress}" />                          
                            </apex:facet>   
                            <apex:facet name="stop" >
                            </apex:facet>
                        </apex:actionStatus>


                    </apex:pageBlock>

                    <apex:pageBlock id="ctr">
                        Total records for Query: <apex:outputText value="{!ctrRecords}" />     
                    </apex:pageBlock>
                </td>
                <td valign="top">

                    <apex:pageBlock mode="edit" id="results">

                        <apex:pageBlockTable value="{!l_records}" var="rec">
                        
                            <apex:repeat value="{!l_fields}" var="fToShow">
                                <apex:column > 
                                    <apex:facet name="header">
                                        <apex:commandLink value="{!fToShow.label}" action="{!toggleSort}" rerender="results,debug, ctr"  status="queryIndicator">
                                            <apex:param name="sortField" value="{!fToShow.field}" assignTo="{!sortField}"/>
                                        </apex:commandLink>
                                    </apex:facet>
                                    <apex:outputField value="{!rec[fToShow.field]}"/>
                                </apex:column>
                            </apex:repeat>
                            
                        </apex:pageBlockTable>

                        <apex:panelGrid columns="10">
                            <apex:commandButton status="fetchStatus" reRender="results" value="|<" action="{!doFirst}" disabled="{!!hasPrevious}" title="First Page" />
                            <apex:commandButton status="fetchStatus" reRender="results" value="<" action="{!doPrevious}" disabled="{!!hasPrevious}" title="Previous Page" />
                            <apex:commandButton status="fetchStatus" reRender="results" value=">" action="{!doNext}" disabled="{!!hasNext}" title="Next Page" />
                            <apex:commandButton status="fetchStatus" reRender="results" value=">|" action="{!doLast}" disabled="{!!hasNext}" title="Last Page" />
                            <apex:outputLabel value=" [page {!pageNumber} of {!totalPages}] " />
                            <apex:outputText >
                               [Items  {!(pageNumber * pageSize)+1-pageSize}-{!IF((pageNumber * pageSize)>noOfRecords, noOfRecords,(pageNumber * pageSize))} of {!noOfRecords} Records]
                            </apex:outputText>
                            &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Select Records per Page: 
                            <apex:selectList value="{!pageSize}" multiselect="false" size="1" onchange="doSearch();">
                                <apex:selectOption itemValue="10" itemLabel="10"/>
                                <apex:selectOption itemValue="20" itemLabel="20"/>
                                <apex:selectOption itemValue="50" itemLabel="50"/>
                                <apex:selectOption itemValue="500" itemLabel="500"/>
                                <apex:selectOption itemValue="1000" itemLabel="1000"/>
                            </apex:selectList><p/>

                            <apex:outputPanel style="color:#4AA02C;font-weight:bold">
                                <apex:actionStatus id="fetchStatus" startText="Fetching..." stopText=""/>
                            </apex:outputPanel>
                        </apex:panelGrid>

                    </apex:pageBlock>

                </td>
            </tr>
        </table>

    </apex:pageBlock>
    
    <apex:actionFunction name="searchServer" action="{!runSearch}" rerender="results,debug,errors,ctr" status="queryIndicator">
        <apex:param name="allInputParams" value="" />
    </apex:actionFunction>

</apex:form>

</apex:page>



4.The above steps were for the infra components.
Now we can reuse it by create custom metadata record.
For example:


-Redirect to the page URL
/apex/SearchObject?pn=Search_Account








at No comments:

View Any Record Page

Common case is when admin/developer need to view additional data in production.
Some common approaches:
-Add the data in the page layout.
-Use developer console query.
-Create list view.
I think the first method is the most common. If the admin uses the same page layouts as regular users then this might expose to users data that they should see, if they have different page layouts then there is no issue for adding the data only this require maintain more page layouts.
The latest 2 approaches- writing a query in console or creating the list view-  also can be used, but are more time consuming.

At last, I decided to use different simple and generic solution. It does require me to write code, but it is done once and then I can reused it.
The functionality is quite simple - user will select the object type, will search single record either by Id or by Name, and will be able to view/update any field.
Of course, that the access for this page should be highly restricted as it provide access to all the data.




Controller:

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public class ViewRecord{

    public String objectType {get; set;}
    public String recordName {get; set;}
    public String recordId {get; set;}
    public map <String, Schema.SObjectType> schemaMap ;
    
    public list<String> l_objects {get ;set;}
    public list<String> l_fields {get; set;}
    public list<String> l_values {get; set;}
    public sObject record {get;set;}
    
    public SelectOption[] selectedFields { get; set; }
    public SelectOption[] allFields { get; set; }
    
    public list<SelectOption> objectoptions{
    get{
        list<SelectOption> pOptions = new list<SelectOption>(); 
        
        pOptions.add(new SelectOption('none', 'Select Object'));
        
        for(String obj: l_objects){
            
            pOptions.add(new SelectOption(obj,obj));
        }
        
        return pOptions;
    }
    set;
    }
    
    public ViewRecord(){
        schemaMap = Schema.getGlobalDescribe();
        l_objects = new list<string>();
        
        selectedFields = new list<SelectOption>();
        allFields = new list<SelectOption>();
        
        for(Schema.SObjectType schemaType : schemaMap.values()){
            
            Schema.DescribeSObjectResult ds = schemaType.getDescribe();
            
            if(ds.isCreateable())
                l_objects.add(ds.getName());
        }
        
        l_objects.sort();
    }
    
    public PageReference fillOptions(){
        selectedFields.clear();
        allFields.clear();
        
        if(objectType != 'none'){
            for(Schema.SObjectField field : schemaMap.get(objectType).getDescribe().fields.getMap().values()){
                Schema.DescribeFieldResult dr  = field.getDescribe();
            
                if(dr.isUpdateable()){
                    allFields.add(new SelectOption(dr.getName(), dr.getName()));
                }
            }
        }
        
        return  Apexpages.currentPage();
    }
    
    public PageReference showRecord(){
    
    try{
    
        if(objectType != 'none'){
            l_fields = new list<String>();
            l_values = new list<String>();
        
            String sql = 'select ';
            
            if(selectedFields.isEmpty()){
                for(Schema.SObjectField field : schemaMap.get(objectType).getDescribe().fields.getMap().values()){
                    Schema.DescribeFieldResult dr  = field.getDescribe();
                
                    if(dr.isUpdateable()){
                        sql += dr.getName() + ',';
                   
                        l_fields.add(dr.getName());
                    }
                }
            }
            else{
                for(SelectOption option : selectedFields){
                    sql += option.getValue() + ',';
                
                    l_fields.add(option.getValue());
                }
            }
            
            l_fields.sort();
            
            sql = sql.subString(0, sql.length()-1) + ' from ' +objectType;
            
            if(!String.isEmpty(recordId))
                sql += ' where id = \'' + recordId + '\'';
            else if(!String.isEmpty(recordName))
                sql += ' where name = \'' + recordName + '\'';
            else{
                ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'Add Filter!'));
                return null;
            }
            
            
            system.debug('####'+ sql);
        
            list<sObject> l_obj = database.query(sql);
        
            if(l_obj.size() > 0){
                //for(String field: l_fields){
                 //   l_values.add((String)l_obj.get(0).get(field));
               // }
                
                record = l_obj.get(0);
            
            }
        }
        
     }catch(Exception ex){
         ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'Bad thing happen...' + ex.getMessage() + ' : ' + ex.getStackTraceString()));
            return null;
     }
    
        return null;
    }
    
    
    
    public PageReference updateRecord(){
        try{
            if(record!=null)
                update record;
                
     ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.INFO, 'Done'));
        }
        catch(Exception ex){
            ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'Bad thing happen...' + ex.getMessage() + ' : ' + ex.getStackTraceString()));
            return null;
        }
        return null;
    }
    
    
    
}




Page
1:  <apex:page controller="ViewRecord">  
2:  <apex:form id="formId">  
3:    <apex:pageMessages />   
4:    <apex:pageblock id="blockId">  
5:     <apex:pageblockSection id="pbSection">  
6:       <apex:pageblockSectionItem id="pbsi">  
7:         <apex:outputLabel value="Select Object" for="objectTypeId" />  
8:         <apex:selectList multiselect="false" id="objectTypeId" value="{!objectType}" size="1">  
9:           <apex:selectoptions value="{!objectoptions}" />  
10:           <apex:actionSupport event="onchange" reRender="formId,blockId,pbSection,pbsi,fieldsId"/>  
11:           <apex:actionSupport event="onchange" action="{!fillOptions}"/>  
12:         </apex:selectList>  
13:       </apex:pageblockSectionItem>  
14:        <apex:pageblockSectionItem />  
15:       <apex:pageblockSectionItem >  
16:         <apex:outputLabel value="Search by Id" />  
17:         <apex:inputText value="{!recordId}"/>  
18:       </apex:pageblockSectionItem>  
19:       <apex:pageblockSectionItem />  
20:       <apex:pageblockSectionItem >  
21:         <apex:outputLabel value="Search by name" />  
22:         <apex:inputText value="{!recordName}"/>  
23:       </apex:pageblockSectionItem>  
24:     </apex:pageblockSection>  
25:     <apex:pageBlockButtons location="top">    
26:       <apex:commandButton value="Show Record" action="{!showRecord}"/>  
27:     </apex:pageBlockButtons>  
28:   </apex:pageblock>  
29:   <apex:pageBlock rendered="{!Not ISBlank(record)}">  
30:     <apex:pageBlockButtons location="top">    
31:       <apex:commandButton value="Update" action="{!updateRecord}" rendered="{!Not ISBlank(record)}"/>  
32:     </apex:pageBlockButtons>  
33:     <apex:pageblockSection >  
34:       <apex:repeat value="{!l_fields}" var="field">  
35:          <apex:pageblockSectionItem >  
36:             <apex:outputLabel value="{!field}" />  
37:             <apex:inputField value="{!record[field]}"/>  
38:          </apex:pageblockSectionItem>  
39:          <apex:pageblockSectionItem />  
40:       </apex:repeat>  
41:     </apex:pageblockSection>  
42:   </apex:pageBlock>  
43:  </apex:form>  
44:  </apex:page>



at No comments:
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