Accessing Embedded Schema fields via list of Component Links

Question

I have a razor component template which is looping through a list of component links trying to read out fields that come from an embedded schema. The Embedded Schema contains fields like Title, Body, Summary etc. I've read the Razor Mediator documentation which also indicates this is the correct method to adopt.

My code looks like this:

@foreach(dynamic item in List)
{
  @item.EmbeddedSchemaName.EmbeddedSchemaFieldName 
}

When I try to preview the page I get the typical razor error indicating the field doesn't exist:

Cannot perform runtime binding on a null reference

Can anyone see a problem here?

Answer 1

Ensure that item.EmbeddedSchemaName.EmbeddedSchemaFieldName is non-null for each item:

@foreach(dynamic item in List)
{
    if (item.EmbeddedSchemaName.EmbeddedSchemaFieldName != null)
    {
        @item.EmbeddedSchemaName.EmbeddedSchemaFieldName 
    }
}

It may be worth doing the same check for item.EmbeddedSchemaName.

From the Razor Mediator documentation:

The DynamicItemFields class will return null if no property name exists in the ItemFields, or if no value was input for single-valued fields.

This is in contrast to Dreamweaver templating, where you could expect an empty string in return for an empty Component field.

Answer 2

I have seen similar behaviour in other cms that use razor so I would agree to check for nulls unless you can use a Linq extension apply a where clause to your for loop

Shame you have to do a null check in a for loop but hey