Migrating a module from 1.6 to 1.7

BACKWARD COMPAT’ BROKEN:

• Payment module have changed, check specific doc.

ENSURE:

• We changed all variables passed to smarty, make sure what you use is still assigned
• $link is deprecated (even if it’s still passed to smarty, it will be removed at some point), use {url} helper
• make sure your use the new way of calling templates: fetch(module:modulename/views/template.tpl)
• make sure you don't add your assets with hardcoded path in displayHeader hook (no change but it’s bad)
• Smarty is automatically escaped, so: 1. Remove all |escape:’html’:’UTF-8’ (FOR FRONT TEMPLATES ONLY) 2. Add nofilter if you print html
• Only rely documented variables ! Any other variable my come from a module or just be a left over and might be removed at any time.
• If you use the backward_compatibility package, check that PrestaShop version is 1.4 before importing it. With PrestaShop 1.7 you’ll get a fatal error

Note: many external libraries have been updated. Here is a list of some external extra doc about it:

• https://github.com/yellowtree/wp-geoip-detect/wiki/How-to-migrate-from-v1-to-v2

How to make a module compatible with 1.6 AND 1.7

• Use legacy translation system ($this->l)
• Use 2 templates different depending on the version
• Implements getWidgetVariables and renderWidget but dont explicitly implements the php interface.
• Create all specific hook method like hookDisplayHeader and call renderWidget with the correct parameters