https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=32494
Bug ID: 32494
Summary: Potentially expensive API calls made for conditional
template rendering
Change sponsored?: ---
Product: Koha
Version: master
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P5 - low
Component: ERM
Assignee: jonathan.druart+k...@gmail.com
Reporter: matt.blenkin...@ptfs-europe.com
CC: jonathan.druart+k...@gmail.com,
jonathan.fi...@ptfs-europe.com,
martin.renvo...@ptfs-europe.com,
pedro.amo...@ptfs-europe.com
Bug 32474 introduces ajax based scrolling in v-selects to reduce expensive API
calls. Within ERM there are components where an API call is made and then
sections of template are conditionally rendered depending on whether the call
returns any data. For example, LicensesList.vue requests a list of all licenses
and then renders a div containing a table if "licences.length" is true. The
table then makes the same API call again to fetch the data to populate the
table. The initial API call is therefore not relevant to the table data and if
there is a large number of licenses, this will be an expensive call to make
simply to render the table before making the same call again.
I would suggest that the initial API call needs to be paginated to return a
small amount of data to pass the licenses.length conditional check. The change
proposed in bug 32474 in fetch.js allows fetchLicenses to be called with a
parameter to paginate to just one page like this: "fetchLicenses(1)". We will
then only be fetching one page of 20 values to pass the check.
N.B. in bug 32474 components with a v-select have already been paginated e.g.
AgreementLicenses.vue - this bug is to patch the components that have not been
modified already, such as LicensesList.vue
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