How to handle nested repeating regions in Dreamweaver TBBs in SDL Tridion 2011 SP1

问题

I am working on DWT TBB in SDL Tridion 2011 SP1.

I have a embedded field "body" which is multivalued. In this embedded field I have one more simple Text field "value", which is again multivalued.

To render the "value" field I have to use two repeating loops.

But I am unable to differentiate the Indeces of the both loops.

I have written as follows.

<!-- TemplateBeginRepeat name="Component.Fields.body" -->
    <!-- TemplateBeginRepeat name="Component.Fields.body[${TemplateRepeatIndex}].value" -->
    <div>@@RenderComponentField("Fields.body[${TemplateRepeatIndex}].value", TemplateRepeatIndex)@@ </div>
    <!-- TemplateEndRepeat -->
<!-- TemplateEndRepeat -->

I am unable to render the fields.

Can any one help how to handle multiple nested regions in DWT TBB.

Thank you.

回答1:

The Tridion practice page that Neil referred to is a good reference. But that page shows how to generically iterate over all embedded fields. In cases where you know the field name, things get a bit easier. In you case, this is all that is needed in your DWT:

<!-- TemplateBeginRepeat name="body" -->
    <!-- TemplateBeginRepeat name="Field.value" -->
        <div>@@RenderComponentField(FieldPath+".value", 
                                               TemplateRepeatIndex)@@ </div>
    <!-- TemplateEndRepeat -->
<!-- TemplateEndRepeat -->

Line by line:

Iterate over the values of the body field of your Component
Iterate over the values of the value subfield of your body embeddable schema
At this stage the FieldPath refers to the current body value, so body[0], body[1], etc. and TemplateRepeatIndex is the index of the current value. So we can construct the correct RenderComponentField call with this knowledge.

Example

I have a Component with two body fields, each with two value fields. So the XML is:

<Content xmlns="uuid:8841d68e-7b1b-45cd-a6d6-7e7da5de3ef9">
    <body>
        <value>body1.value1</value>
        <value>body1.value2</value>
    </body>
    <body>
        <value>body2.value1</value>
        <value>body2.value2</value>
    </body>
</Content>

The output from the above DWT on this Component is:

<div><tcdl:ComponentField name="body[0].value"
                          index="0">body1.value1</tcdl:ComponentField></div>
<div><tcdl:ComponentField name="body[0].value" 
                          index="1">body1.value2</tcdl:ComponentField></div>
<div><tcdl:ComponentField name="body[1].value" 
                          index="0">body2.value1</tcdl:ComponentField></div>
<div><tcdl:ComponentField name="body[1].value" 
                          index="1">body2.value2</tcdl:ComponentField></div>

Debugging these situations

Many people have problems writing constructs like these. I am no exception, I have just found that I can get most cases working by knowing that the crucial variables are: Field, FieldPath and TemplateRepeatIndex. When in doubt, simply embed this fragment into your DWT inside every TemplateBeginRepeat.

(FieldPath=@@FieldPath@@, TemplateRepeatIndex=@@TemplateRepeatIndex@@)

回答2:

Does the FieldPath variable not help you here?

See the Tridion Practice site for an example of iterating over multivalue embedded fields.

回答3:

As you noticed already, you cannot use the outer loop index inside the inner loop. The inner loop index will hide the outer loop index. Therefore, you need a workaround. I can think of 2 that I used in the past:

Use a C# TBB (either assembly or fragment) to generate the output. This is not a very nice solution, but it is practical. You could at least generate the output of the inner loop and store the individual values in Package variables. Then in the outer loop you can simply iterate over the values and include them in the output. Example: create variables called body_0, body_1, etc. Then output them inside the outer loop using @@body_${TemplateRepeatIndex}@@
Use Dreamweaver functions to simulate the inner loop index. You can have a function to Set a Package item variable, and one to Increment it. Then use this variable inside the loops. Example:

<!-- TemplateBeginRepeat name="Component.Fields.body" -->
    @@Set("i", 0)@@
    <!-- TemplateBeginRepeat name="Component.Fields.body[${i}].value" -->
        <div>@@Component.Fields.body[${i}].value[${TemplateRepeatIndex}]</div>
    <!-- TempalteEndRepeat -->
    @@Increment("i")@@

You will have to write the Set and Increment DWT functions yourself to store and increment a value in the Package.

回答4:

Try this way:-

<!-- TemplateBeginRepeat name="Component.Fields.body" -->
    @@Push("PrimaryIndex", TemplateRepeatIndex)@@
    <!-- TemplateBeginRepeat name="Component.Fields.body[${PrimaryIndex}].value" -->
            @@Push("SecondaryIndex", TemplateRepeatIndex)@@
            <div>@@RenderComponentField("Fields.body[${PrimaryIndex}].value", ${SecondaryIndex})@@ </div>
    <!-- TemplateEndRepeat -->
<!-- TemplateEndRepeat -->

UPDATE 1:

Just I got an idea on this. How about doing this way?

<!-- TemplateBeginRepeat name="Component.Fields.body" -->
    <!-- TemplateBeginRepeat name="value" -->               
            <div>@@Field@@</div> 
    <!-- TemplateEndRepeat -->
<!-- TemplateEndRepeat -->

Without using any TemplateRepeatIndex

回答5:

For those who are using Tridion 2009 without SP1 version (like our customer), 'FieldPath' variable cannot be used as suggested in the earlier answers. But there is a simple way to achieve this in DWT itself as given below in the example code:

    <!-- TemplateBeginRepeat name="Component.body" -->
        <!-- TemplateBeginRepeat name="Field.value" -->
         <div> @@Field@@> </div>
        <!-- TemplateEndRepeat -->
    <!-- TemplateEndRepeat -->

来源：https://stackoverflow.com/questions/10309577/how-to-handle-nested-repeating-regions-in-dreamweaver-tbbs-in-sdl-tridion-2011-s

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