Monitoring the progress of file uploads within itemView

Question

Monitoring the progress of file uploads within itemView

In the process of developing an application using Marionette/Backbone, I have successfully implemented file uploads over an AJAX call. Now, I am looking for a way to provide users with feedback on when they can select the uploaded file and proceed with modifications. The challenge lies in tracking progress within a Model and ItemView structure. Storing progress data in attributes is not ideal as all attributes are saved to the database upon syncing with the server. Therefore, I need to find a solution that allows the ItemView to listen for updates from the model indicating completion.

I have managed to come up with a basic solution, but now I need to integrate it effectively within the Marionette/Backbone framework.

Section of ItemView Code:

modelEvents: {
    'change': 'fieldsChanged'
},

fieldsChanged: function() {
    this.render();
},

javascript ajax backbone.js marionette

Answer 1

Answer №1

Typically, it is common to have multiple ItemView views, each associated with its own model. To effectively monitor changes in the model linked to a particular view, maintaining state information regarding that model is essential. The most practical approach to ensure accessibility of this data within the methods of your ItemView is by setting it as a property of the view itself. In a scenario like yours, you would likely implement something similar to:

onClick: function (event) {
  this.progress = 'pending';
  this.model.save({ filename: this.fileName });
}

Upon receiving the updated model, you would proceed with:

fieldChanged: function () {
  this.progress = 'loaded';
  this.render();
}

An alternative method to store model metadata and make it accessible within a view's context could be through a global variable. However, this approach presents its drawbacks - such as polluting the global scope and difficulties in referencing the global variable for a specific view model. By allowing the view to manage all model metadata, you can address these issues and align more closely with best practices.

Alternatively, for greater consistency, you may set the progress property directly on the model itself. This way, even when the model is passed between different views, the state information remains attached to the model. Your code snippet would appear as follows:

onClick: function (event) {
  this.model.progress = 'pending';
  this.model.save({ filename: this.fileName });
}

Upon model update, the following action can be taken:

fieldChanged: function () {
  this.model.progress = 'loaded';
  this.render();
}

Answer 2

Typically, it is common to have multiple ItemView views, each associated with its own model. To effectively monitor changes in the model linked to a particular view, maintaining state information regarding that model is essential. The most practical approach to ensure accessibility of this data within the methods of your ItemView is by setting it as a property of the view itself. In a scenario like yours, you would likely implement something similar to:

onClick: function (event) {
  this.progress = 'pending';
  this.model.save({ filename: this.fileName });
}

Upon receiving the updated model, you would proceed with:

fieldChanged: function () {
  this.progress = 'loaded';
  this.render();
}

An alternative method to store model metadata and make it accessible within a view's context could be through a global variable. However, this approach presents its drawbacks - such as polluting the global scope and difficulties in referencing the global variable for a specific view model. By allowing the view to manage all model metadata, you can address these issues and align more closely with best practices.

Alternatively, for greater consistency, you may set the progress property directly on the model itself. This way, even when the model is passed between different views, the state information remains attached to the model. Your code snippet would appear as follows:

onClick: function (event) {
  this.model.progress = 'pending';
  this.model.save({ filename: this.fileName });
}

Upon model update, the following action can be taken:

fieldChanged: function () {
  this.model.progress = 'loaded';
  this.render();
}

Monitoring the progress of file uploads within itemView

Answer №1

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