adding save button with ui_component not working

Question

after adding the button in ui_component. i give error 500 Internal Server Error not going to post values on save controller. It posting on current url. Example i am using for adding the button.

Question reference

<argument name="data" xsi:type="array">
 <item name="js_config" xsi:type="array">
 <item name="provider" xsi:type="string">categories_index_edit.category_form_data_source</item>
 <item name="deps" xsi:type="string">categories_index_edit.category_form_data_source</item>
 </item>
 <item name="label" xsi:type="string" translate="true">News Category</item>
 <!-- <item name="config" xsi:type="array">
 <item name="dataScope" xsi:type="string">data</item>
 <item name="namespace" xsi:type="string">categories_index_edit</item>
 </item> -->
 <item name="template" xsi:type="string">templates/form/collapsible</item>
 <item name="buttons" xsi:type="array">
 <item name="back" xsi:type="string">Namespace\Modulename\Block\Adminhtml\Category\Edit\BackButton</item>
 <item name="save" xsi:type="string">Namespace\Modulename\Block\Adminhtml\Category\Edit\SaveButton</item>
 </item>
 <item name="layout" xsi:type="array">
 <item name="type" xsi:type="string">tabs</item>
 </item>
 </argument>

error

Notice: Undefined index: data in /opt/lampp/htdocs/m2_module/vendor/magento/framework/View/Element/UiComponent /ContentType/Json.php on line 71

0 /opt/lampp/htdocs/m2_module/vendor/magento/framework/View/Element/UiComponent/ContentType/Json.php

(71): Magento\Framework\App\ErrorHandler->handler(8, 'Undefined index...', '/opt/lampp/htdo...', 71, Array)

1 /opt/lampp/htdocs/m2_module/vendor/magento/module-ui/Component/AbstractComponent.php(118): Magento \Framework\View\Element\UiComponent\ContentType\Json->render(Object(Magento\Ui\Component\Form), 'templates /form/...')

2 /opt/lampp/htdocs/m2_module/vendor/magento/module-ui/Component/Wrapper/UiComponent.php(72): Magento \Ui\Component\AbstractComponent->render()

• Raphael at Digital Pianism: Please post the 500 error in your question.
• Qaisar Satti: @RaphaelatDigitalPianism i think posting on same page will causing itbecause loading the same form again.
• Raphael at Digital Pianism: Well post the error from your server error log and we'll know. Assuming is never good in programming
• Qaisar Satti: @RaphaelatDigitalPianism it is about form element layout errors. add the error.
• Qaisar Satti: @RaphaelatDigitalPianism the button is not redirect to save instead submit on current url via ajax any idea?

Answer 1

After lot of searches i found that problem was with the magento version ui_component form is only working magento 2.1. After moving this code to magento 2.1 solved the problem.

• Teja Bhagavan Kollepara: please edit the magento spellings in your post
• Teja Bhagavan Kollepara: You are welcome sir. you helped me many times.