How to allow only numbers in certain input-field for Magento Admin Control-Table/Config-Table

Question

I want to allow only numbers for a certain input field in a Magento Admin Control-Table/Config-Table. Has anyone done that before or has a hint?

Greez

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• Dhiren Vasoya: I post the updated answer, kindly check that will work for you.

Answer 1

You have to added validation class.

$this->addColumn('yourfieldname', ['label' => __('Your Label'),'class' => 'required-entry validate-number']);

• TheBasicBoi: Hey, unfortunately this didn't fix the issue. :/
• Dhiren Vasoya: I update the code, kindly check those things.
• TheBasicBoi: Dhiren thank you very much, this did it for me! But now i have the Problem with the required-enty Attribute. This field should not be required but if i undo this, it won't work.
• Dhiren Vasoya: you can remove this class : required-entry then run all magento commands again and then check.
• TheBasicBoi: Yup, I did and it worked! Thanks again! :)

Answer 2

In store configuration fields, you can use below code to allow numbers only

 <config>
 <sections>
 <newsletter translate="label" module="newsletter">
 <label>Custom Label</label>
 <tab>phone</tab>
 <frontend_type>text</frontend_type>
 <sort_order>110</sort_order>
 <show_in_default>1</show_in_default>
 <show_in_website>1</show_in_website>
 <show_in_store>1</show_in_store>
 <validate>validate-number</validate>
 </newsletter>
 </sections>
 </config>