Multi step batch action in Sonata Admin
<p>I have a contact entity. Where the website users will send message to admin. At ADMIN the admin need to send reply MSG to the users(Entity has an email field). Form sonata admin batch action doc - I created a replyMSG batch action for individual contact entity item(Its working successfully).</p>

<p><a href="https://i.stack.imgur.com/HqyCW.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HqyCW.jpg" alt="enter image description here"></a></p>

<p><strong>But I failed to create multiple reply(Mail carbon copy).</strong></p>

<p>What I needed is, Admin select a list of items and select batchSMS (form batch action choice <strong>"Reply Selected - refer attached IMAGE"</strong>) and click ok button. Then bootstrap MODEL needs to be popup with a textarea field - admin fills it - and submit to do process(Handle this in customCRUD - I know this from admin doc).</p>

<p><a href="https://i.stack.imgur.com/Gtwf3.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Gtwf3.jpg" alt="enter image description here"></a></p>

<p>Does anyone succeed in this MULTI-STEP batch action? I refered these following links but no success..</p>

<ul>
<li><a href="https://stackoverflow.com/q/23996476/1958355">Sonata Admin Bundle - add a multi step batch action</a></li>
<li><a href="https://stackoverflow.com/q/33264357/1958355">Batch multi step and/or form multi step in sonata admin bundle</a></li>
</ul>