I have added custom filed in quote and order table,
when ever i want to save i get
Property "MetroTimeSlot" does not have corresponding setter in class "Magento\Checkout\Api\Data\ShippingInformationExtensionInterface"
i have already added metro_time_slot in extension_attributes.xml
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Api/etc/extension_attributes.xsd">
<extension_attributes for="Magento\Checkout\Api\Data\ShippingInformationInterface">
<attribute code="metro_time_slot" type="string"/>
</extension_attributes>
Best Answer
I solved the same issue by removing files from [magento root]/var/generation/ folder.