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Editorial Team
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Asked: 2026-06-12T13:39:55+00:00

I have a module (not created by me) which picks up a quote and

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I have a module (not created by me) which picks up a quote and applies a discount if certain criteria are met. This works fine on it’s own. The shopping cart rules also work fine on their own.

However, I need the custom module to apply relevant discounts before the built in Magento shopping cart (total price) rules are applied. As it stands the Magento ones apply first, and then the custom ones, leading to Magento discounts when there shouldn’t be.

What controls the order of the modules, and thus how would I specify a different order.

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1 Answer

  1. Editorial Team

    Magento has the collectTotals functional (I believe this is realization of the Composite pattern). What it basicly does – is address each of the specified Totals Collectors in order and call it’s collect() method.

    Most likely the total collector for your module is called after the SalesRule one (which has code discount). So what you need to do: open the config.xml configuration file of the custom discount module, find the xpath config/global/sales/quote/totals/[the module alias] and add (or change if it exists) the directive <before>discount</before>

    In that way you’re ordering the total collector of the custom module to apply discounts before the SalesRule one.

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