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PObeforeSave triggered many times in self-defined cloud function
 

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  1. PObeforeSave triggered many times in self-defined cloud function
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    <p>I create a class is called <code>Photo</code>, and there is a <strong>sizes</strong> filed that includes all dimensions of image Parse file (ex: <em>original</em>, <em>thumbnail</em>, ...).</p> <p>The image manipulations I wrote in the <code>Photo</code> cloud function <em>beforeSave()</em>.</p> <p>And I wrote the second self-defined cloud function <code>AddUserProfilePhoto</code> which can receive the uploaded Parse file and create a new <code>Photo</code> object with cloud code.</p> <p>My problem is the second cloud function <code>AddUserProfilePhoto</code> that it create the <code>Photo</code> object with the uploaded Parse file and assign the <code>Photo</code> object to the user as a pointer, when save the user object and the beforeSave() function of <code>Photo</code> object is triggered many times until respond error.</p> <pre><code>/* Profile Image Thumbnail */ // Parse original file is uploaded, and is being to manipulate to other dimension files and associate to the `Photo` object. Parse.Cloud.beforeSave("Photo", function(request, response) { var userPhoto = request.object; if (!userPhoto.get("sizes")["original"]) { response.error("UserPhoto must have original photo file pointer reference."); return; } Parse.Cloud.httpRequest({ url: userPhoto.get("sizes")["original"].url() }).then(function(response) { var image = new Image(); return image.setData(response.buffer); }).then(function(image) { // Crop the image to the smaller of width or height. var size = Math.min(image.width(), image.height()); return image.crop({ left: (image.width() - size) / 2, top: (image.height() - size) / 2, width: size, height: size }); }).then(function(image) { // Resize the image to 98x98 return image.scale({ width: 98, height: 98 }); }).then(function(image) { // Make sure it's a JPEG to save disk space and bandwidth. return image.setFormat("JPEG"); }).then(function(image) { // Get the image data in a Buffer return image.data(); }).then(function(buffer) { // Save the image into a new file. var base64 = buffer.toString("base64"); var cropped = new Parse.File("thumbnail.jpg", { base64: base64 }); return cropped.save(); }).then(function(cropped) { // Attach the image file to the original object. userPhoto.get("sizes")["thumbnail"] = cropped; // Attach the user pointer to the photo object. userPhoto.set("userObject", request.user); }).then(function(result) { response.success(); }, function(error) { response.error(error); }); }); /* Add user profile photo */ Parse.Cloud.define("AddUserProfilePhoto", function(request, response) { var file = request.params.file; var Photo = Parse.Object.extend("Photo"); var user = request.user; var photo = new Photo(); var sizes = {"original": file}; photo.save({ sizes: sizes }, { success: function(photo) { // check the output, photo object id is existed, so the photo is truly saved in the database. console.log("AddUserProfilePhoto saved photo id: " + photo.id); user.save({ userPhotoObject: photo }, { success: function(user) { console.log("user photo saved, and userId: " + user.id); response.success(user); }, error: function(error) { console.error(error); response.error(error); } }); }, error: function(error) { console.error(error); response.error(error); } }); }); </code></pre> <hr> <p>Always respond the error:</p> <p>AddUserProfilePhoto response error: Error Domain=Parse Code=141 "<strong>The operation couldn’t be completed. (Parse error 141.)</strong>" UserInfo=0x15e1e9e0 {<strong>code=141, error=Uncaught Tried to save an object with a pointer to a new, unsaved object.</strong>} in the iOS client.</p> <p>And the cloud console logged <strong>before_save triggered for Photo for user <code>UserObjectId...</code></strong> many times (nearly 50 times). Saved many thumbnails but only one thumbnail image file leave in the Photo object.</p>
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