isc_Canvas_invalidateCache() error in 11.0 since 2016-06-16

[DaveC]

isc.version="v11.0p_2016-08-01/LGPL Deployment"

Internet Explorer 11


We started to get an error from our SmartClient application on moving between two
recent builds of 11.0.
We saw
Error: Unable to get property 'context' of undefined or null reference
when changing the data shown within a moderately complex form.

We traced the error to a single if statement added to the function isc_Canvas_invalidateCache()
some time between build 2016-06-16 and build 2016-08-01.

This is a super-simple fix. so I believe you will just want to apply it straight away but if you need help to reproduce it, let me know andI will try to assist.

Please see the 3 code fragments below , ie:
1. The 2016-06-16 version, which was working for us.
2. The 2016-08-01 with the extra "if" test that is the source of the error.
3. A fix we have applied to ISC_Core.js which eliminates the error.


// Taken from ISC_Core.js

// isc.version="v11.0p_2016-06-16/LGPL Deployment"
function isc_Canvas_invalidateCache() {
if (this.data && this.data.invalidateCache != null)
return this.data.invalidateCache();
else if (this.isGrouped && isc.isA.ResultSet(this.originalData)) {
this.originalData.setSort(this.data.getSort(), true);
this.originalData.invalidateCache();
this.regroup()
}
}

//isc.version="v11.0p_2016-08-01/LGPL Deployment"
function isc_Canvas_invalidateCache() {
if (this.data.context) {
delete this.data.context.data;
delete this.data.context.implicitCriteria
}
if (this.data && this.data.invalidateCache != null)
return this.data.invalidateCache();
else if (this.isGrouped && isc.isA.ResultSet(this.originalData)) {
this.originalData.setSort(this.data.getSort(), true);
this.originalData.invalidateCache();
this.regroup()
}
}

/*
The FIX that we have applied. We suggest this is applied to your source.
Note the added "this.data &&" in the first "if" statement;
*/
function isc_Canvas_invalidateCache() {
if (this.data && this.data.context) {
delete this.data.context.data;
delete this.data.context.implicitCriteria
}
if (this.data && this.data.invalidateCache != null)
return this.data.invalidateCache();
else if (this.isGrouped && isc.isA.ResultSet(this.originalData)) {
this.originalData.setSort(this.data.getSort(), true);
this.originalData.invalidateCache();
this.regroup()
}
}


Stack Trace:

TypeError: Unable to get property 'context' of undefined or null reference
at isc_Canvas_invalidateCache (http://10.70.99.22/OA10-XA/XA/isomor...re.js:3449:586)
at EntityDataLoaded (Function code:1043:21)
at isc_c_Class_fireCallback (http://10.70.99.22/OA10-XA/XA/isomor...Core.js:281:68)
at Anonymous function (http://10.70.99.22/OA10-XA/XA/Static...a-SC.js:195:17)
at Anonymous function (http://10.70.99.22/OA10-XA/XA/Main.vbhtml:128:21)
at isc_c_Class_fireCallback (http://10.70.99.22/OA10-XA/XA/isomor...Core.js:281:68)
at isc_Class_fireCallback (http://10.70.99.22/OA10-XA/XA/isomor...ore.js:349:279)
at isc_c_RPCManager_fireReplyCallback (http://10.70.99.22/OA10-XA/XA/isomor...ing.js:1687:67)
at isc_c_RPCManager_fireReplyCallbacks (http://10.70.99.22/OA10-XA/XA/isomor...ng.js:1692:123)
at isc_c_RPCManager_performOperationReply (http://10.70.99.22/OA10-XA/XA/isomor...ng.js:1685:119)

[Isomorphic]

Thanks for the heads up, it has been already fixed, you'll find the fix applied to the next nightly build.

[DaveC]

Good to see the quick turnaround on this. Gives us more confidence in using SmartClient within our system.