[SalesForce] Convert a Map Values to a List of values

How to convert Map to List, here is what I have tried but getting the error:

List<Product2> productList = new List<Product2>();
productList.addAll(mapProducts.values());

Error:

> Incompatible argument type List<ProductWrapper> for All method on
> List<Product2>

Map:

Map<Id, ProductWrapper> mapProducts = new Map<Id, ProductWrapper>();

for (Product2 p : /*list of records*/) 
{        
    if(p.Asset_Line_items__r.isEmpty()){
      mapProducts.put(p.id, new ProductWrapper(p,new Asset_Line_Item__c(Quantity__c = 0))); 
    }
    else {            
      for(asset_line_items__c b : p.asset_line_items__r) {
          ProductWrapper pw = new ProductWrapper(p,b); 
          mapProducts.put(p.Id, pw);    
         }  
      }   
}

Wrapper class:

public class ProductWrapper {

    public Product2 product {get;set;}
    public asset_line_items__c ali {get;set;}    

    public ProductWrapper(Product2 p, asset_line_items__c ali) {
        product = p;
        this.ali = ali;
    }
}

Best Answer

The map's value (ProductWrapper) is incompatible with the list's value (Product2). You'd have to extract the values manually:

for(ProductWrapper wrapper: mapProducts.values()) {
    productList.add(wrapper.product);
}

Related Solutions

[SalesForce] Iterate through Map with a List of sObjects

Your key in the map is of type Id, so your first for loop should be on Id:

for (Id recordId : quotes.keySet())
{}

Then your value for each of the keys (IDs) is a list of quotes, meaning the second for loop will be on the Quote object:

for (Id recordId : quotes.keySet())
{
    for (Quote quoteRecord : quotes.get(recordId))
    {
        // do something
    }
}

Alternatively if you want to go through all the quotes regardless of the IDs, you can do this:

for (List <Quote> quoteList : quotes.values())
{
    for (Quote quoteRecord : quoteList)
    {
        // do something
    }
}

[SalesForce] How to sort keys in MAP while grouping

Java has multiple map classes such as LinkedHashMap that preserve insertion order but Apex only has one map type which does not. So in Apex a work-around is to keep a separate list of the keys as lists preserve insertion order and get the keys to iterate through from the list:

private Map<string, groupingWrapClass> map_lineitems_Group
        = new Map<string, groupingWrapClass>();
private List<String> ordered_keys = new List<String>();

private void addToMap(String key, groupingWrapClass grouping) {
    map_lineitems_Group.put(key, grouping);
    ordered_keys.add(key);
}

private void xyz() {
    ...
    addToMap('XYZ', keyvalues);
    addToMap('ABC', keyvalues);
    ...
    // Run through the map keys in insertion order
    for (String key : ordered_keys) {
        groupingWrapClass grouping = map_lineitems_Group.get(key);
        ...
    }
}

On exposing this to Visualforce, make both ordered_keys and map_lineitems_Group visible (add getters or make properties) and then e.g.:

<apex:pageBlockTable value="{!ordered_keys}" var="ordered_key">
<apex:column headerValue="Year Name" value="{!map_lineitems_Group[ordered_key].yearname}"/>
...
</apex:pageBlockTable>

as expressions in Visualforce use [] for map access.

You could also add an apex:variable to factor out the common map_lineitems_Group[ordered_key] expression.

Best Answer

Related Solutions

[SalesForce] Iterate through Map with a List of sObjects

[SalesForce] How to sort keys in MAP while grouping

Related Topic