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Harvard-ATG / hxat

Contains the currently-in-development project by HarvardX to bring the annotation tool currently living in the edX platform to a more accessible LTI implementation.
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problem loading annotations on initial page load. #47

Closed ShannonRice closed 8 years ago

ShannonRice commented 8 years ago

This is a problem with the page loading annotations correctly.

When I first go to "The Phoenix" assignment in the English 102H course, https://canvas.harvard.edu/courses/6571/external_tools/10610

The annotations from lines 1-13 do not display at all. (see screenshot 1) (There are also other clusters of annotations not displaying, if you compare the two screenshots.... )

annotationsx1

After I click the "Instructor" button, they all load and display properly, and if I then click "Public", they all load correctly.
annotationsx2

For some reason they do not load initially.

This is a problem, since students would expect to see the annotations. I'm not sure if it is specific to this assignment, or more wide spread. I will continue testing to see if I can recreate on another site.

arthurian commented 8 years ago

Follow-up for posterity: we figured out this issue was caused by the pagination behavior of the annotation assignment. By default, the assignment loads annotations in batches of 20 and for some reason, the first batch that is loaded isn't the first batch of text annotations, so it appears as if that first batch is lost. The work around is to edit the assignment and increase the pagination limit to avoid the problem.

This issue is addressed in https://github.com/lduarte1991/hx-annotations-lti/pull/44, which increases the default pagination limit so that users won't encounter this issue in practice. We could configure the default to be something like 1000.

arthurian commented 8 years ago

Closing this issue since there's a workaround (edit assignment pagination limit) and an upcoming fix that will permanently set the pagination limit much higher.