Using <mvt:assign with arrays

[RayYates]

I use Toolbelt to sum array elements using and index to the array. but this does not work with mvt:assign, because it does not parse the array index.

<mvt:item name="ry_toolbelt" param="assign|l.all_settings:totals[g.index]:quantity|l.all_settings:totals[g.index]:quantity + l.all_settings:item:quantity" />

How would I do this in straight page template language.

I've used miva_array_insert() to add items to an array, but here I need to sum elements

[Scot - ScotsScripts.com]

I don't think you can assign the sum to an array element, although I have not tested, either way here's how to add those two vars together.

<mvt:assign name="l.settings:sum" value="l.all_settings:totals[g.index]:quantity + l.all_settings:item:quantity" />

sum = &mvt:sum;

[RayYates]

That's a good suggestion and gets us 1/2 way there. I swear, I worked out how to do that at one point; for the life of me, I can't remember how.
I was just looking at this command with interest. http://www.mivascript.com/item/miva_...ilter_ref.html

Ideally we would have support for one of these syntax examples.
Hint Hint er.. ah... Jon B?

<mvt:assign name="{ l.variable_name }" value="g.total" />    Useful... Create the array structure element as a string assigned to l.variable first
<mvt:assign name="l.array" index="l.index" member="total" value="g.total" />   Better
<mvt:assign name="l.array[l.index]:total" value="g.total" />  My personal favorite.

Or alternatively a new string function  miva_reference() would allow us to two step it.
<mvt:assign name="l.varname" value="miva_reference( 'l.all_settings:totals[g.index]:quantity' )" />
<mvt:assign name="l.varname" value="g.total" />

Note again Toolbelt: <mvt:item name="ry_toolbelt" param="reference|new_variable_name|old_variable_name" />

Since the template compiler is a subset of the Miva Script compiler. It should be doable, especially the parsing of [ l.index ]. Any bracket contents [xxx] in the variable name would need to be evaluated just like value="expression"

[RayYates]

For Posterity

I found a pure Miva Script solution using miva_array_filter_ref(), if you don't mind doing a search. It creates a record by reference to the Array index that you can then update.

<mvt:foreach iterator="item" array="order:items">
    <mvt:if expr="l.settings:item:code IN g.category_product_list">

        <mvt:assign name="l.record_found" value="miva_array_filter_ref( l.settings:totals, 1, l.item, 'l.item:code EQ l.settings:item:code', l.record )" />

        <mvt:if expr="l.record_found">
            <mvt:comment> sum </mvt:comment>

            <mvt:assign name="l.record[1]:price" value="(l.settings:item:price * l.settings:item:quantity) + l.record[1]:price" />
            <mvt:assign name="l.record[1]:quantity" value="l.settings:item:quantity + l.record[1]:quantity" />
        <mvt:else>
            <mvt:comment> create record </mvt:comment>
            <mvt:assign name="l.record:code" value="l.settings:item:code" />
            <mvt:assign name="l.record:unit_price" value="l.settings:item:price" />
            <mvt:assign name="l.record:price" value="l.settings:item:price" />
            <mvt:assign name="l.record:quantity" value="l.settings:item:quantity" />
            <mvt:assign name="l.void" value="miva_array_insert( l.settings:totals , l.record, '-1' )" />
        </mvt:if>

    </mvt:if>
</mvt:foreach>

What I'd really like to see is a new function to update the array records. Ideally, it would only update element:members. Not the entire record.
miva_array_update( array var, element var, pos )

[netblazon]

Hear, hear! I second this request.

Thankfully the site I'm working on already has the toolbelt module. I'd rather not have to use it for this, but better than nothing.