bootstrap modal dissappearing in rails 4 - ruby-on-rails

I'm having some trouble with a bootstrap modal in rails 4. I'm trying to display a modal when you click an image. And actually the modal is displayed, but only for a few seconds, and then it close itself.
(I'm using bootstrap-sass gem)
This is the code I have:
<%= link_to image_tag (destacado.imagen.small), data: {toggle: "modal", target: "#myModal"} %>
<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title" id="myModalLabel">Modal title</h4>
</div>
<div class="modal-body">
...
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Save changes</button>
</div>
</div>
</div>
</div>
Any idea what I am doing wrong?? Thank you in advance for any help!
Peyu

I think this is because your link_to will redirect the page.
Not a lot of information is provided, so that's just my guess.
If you wanted your link to just do data-toggle behaviour, maybe it doesn't need to be a link, just an image_tag with data-toggle behaviour.

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First of all, cpoy this modal code, it is official from bootsrap,
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Copy the modal from here and go to index.html.erb
Place a
<%= link_to (your_edit_path) do %>
# place modal here After inserting your required fields using form_for helper
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how to make a link to bootstrap modal through image with ruby on rails

I'm trying to make a link to bootstrap modal through clicking image.
I'm basically trying to adapt bootstrap demo code to ruby tags.
<%= link_to 'data-toggle' => 'modal', 'data-target' => '#exampleModalLong' do %>
<%= image_tag("https://i.imgur.com/qtVofCH.jpg", :class => "portfolio-image") %>
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<div class="modal-dialog" role="document">
...
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But this doesnt work. This makes it go to the top of the page, adding
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Edit1: Now i target the modal with just '#exampleModalLong':
<%= link_to '#exampleModalLong', 'data-toggle' => 'modal' do %>
<%= image_tag("https://i.imgur.com/qtVofCH.jpg", :class => "portfolio-image") %>
<% end %>
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But it still won't work properly. Atleast it doesn't bring me back on the top of the page. And adds
/#exampleModalLong
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<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
...
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<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Save changes</button>
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</div>
</div>
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<div class="modal-dialog">
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<div class="modal-header">
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Using Grails 2.2.1, Twitter Bootstrap plugin. I'm using modals and mine are set up with 3 exit approaches. Either hit the x button, click a close button, the save button, OR, click anywhere outside the modal to close.
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Here's my gsp code*sec* part is just a taglib for a security plugin I'm using):
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<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
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<div class="modal-body">
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<div class="modal-footer">
<button class="btn" data-dismiss="modal" aria-hidden="true">Close</button>
<button class="btn btn-primary">Save changes</button>
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<div id="signupModal" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="signupModalLabel" aria-hidden="true">
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<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
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<div class="modal-body">
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<div class="modal-footer">
<button class="btn" data-dismiss="modal" aria-hidden="true">Close</button>
<g:link class="btn btn-primary">Create Account</g:link>
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<sec:ifNotLoggedIn>
<g:javascript>
$('#loginModal').modal({
remote: "${createLink(controller:'login', action:'auth')}",
show: false
})
$('#signupModal').modal({
remote: "${createLink(controller:'user', action:'create')}",
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})
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<g:link fragment="loginModal" class="btn" data-toggle="modal">
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<br/>
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</sec:ifNotLoggedIn>
I tried using:
$('#loginModal').modal({
remote: "${createLink(controller:'login', action:'auth')}",
show: false
})
$('#signupModal').modal({
remote: "${createLink(controller:'user', action:'create')}",
show: false
})
But I still get 2 backdrops opening when I click on a single modal link.
This seems to be a Grails issue, because I don't get this problem with jsFiddle:

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