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A very basic example in Javascript of how to attach a file to a CouchDB document. This will work wether or not the Document ID you define exists.
<!DOCTYPE html>
<! --
A very basic example in Javascript of how to attach a file to a CouchDB document. This will work wether or not the Document ID you define exists.
Log in at /_utils, upload this file to a document, and then view it for your own uploader. See the code for comments. ajaxSubmit() is the magic that attaches
as long as the Couch Doc exists because you can't submit a new Couch Document with an attachment.
by @rjsteinert http://rjsteinert.com
-->
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" >
<!-- jQuery assets -->
<script src="/_utils/script/json2.js"></script>
<script src="/_utils/script/jquery.js?1.2.6"></script>
<script src="/_utils/script/jquery.couch.js?0.8.0"></script>
<script src="/_utils/script/jquery.form.js?0.9.0"></script>
<script type="text/javascript">
$(function() {
$('form.documentForm').submit(function(e) {
// Prevent submit because we will use ajaxSubmit() to actually send the
// attachment to CouchDB.
e.preventDefault();
// Get the user supplied details
var input_db = $('.documentForm input#_db').val()
var input_id = $('.documentForm input#_id').val()
var input_rev = $('.documentForm input#_rev').val()
// Start by trying to open a Couch Doc at the _id and _db specified
$.couch.db(input_db).openDoc(input_id, {
// If found, then set the revision in the form and save
success: function(couchDoc) {
// Defining a revision on saving over a Couch Doc that exists is required.
// This puts the last revision of the Couch Doc into the input#rev field
// so that it will be submitted using ajaxSubmit.
$('.documentForm input#_rev').val(couchDoc._rev);
// Submit the form with the attachment
$('form.documentForm').ajaxSubmit({
url: "/"+ input_db +"/"+ input_id,
success: function(response) {
alert("Your attachment was submitted.")
}
})
}, // End success, we have a Doc
// If there is no CouchDB document with that ID then we'll need to create it before we can attach a file to it.
error: function(status) {
$.couch.db(input_db).saveDoc({"_id":input_id}, {
success: function(couchDoc) {
// Now that the Couch Doc exists, we can submit the attachment,
// but before submitting we have to define the revision of the Couch
// Doc so that it gets passed along in the form submit.
$('.documentForm input#_rev').val(couchDoc.rev);
$('form.documentForm').ajaxSubmit({
// Submit the form with the attachment
url: "/"+ input_db +"/"+ input_id,
success: function(response) {
alert("Your attachment was submitted.")
}
})
}
})
} // End error, no Doc
}) // End openDoc()
}) /* End form.documentForm submit */
}) /* End jQuery ready */
</script>
</head>
<body>
<form class="documentForm" method="post" action="" enctype="multipart/form-data">
<input type="text" name="_db" id="_db" placeholder="Database ID" />
<input type="text" name="_id" id="_id" placeholder="Document ID" />
<input type="text" name="_rev" id="_rev" placeholder="Revision ID (always overridden in code)" />
<input type="file" name="_attachments" id="_attachments" multiple="multiple" />
<input type="submit" class="Submit" value="Submit" />
</form>
</body>
</html>
@renatoathaydes

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@renatoathaydes renatoathaydes commented Nov 20, 2012

Thanks for posting this, it helped me a lot!

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