KB-2003 Quick App "Trends" tab fails to load when user field added due to invalid value for "links"

Parmida Borhani — Fri, 20 Sep 2019 04:10:04 GMT

Current Revision posted to Appian Knowledge Base by Parmida Borhani on 9/20/2019 4:10:04 AM

Symptoms

After creating a Quick App (New Application --> Create Using Application Builder (Full)), specifying a user field for the form, and submitting a data entry through the Quick App, the following error is encountered:

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

The generated Quick App interface for the "Trends" tab has a format username expression rule!IST_FormatName(fv!row.<userfield>() that is wrapping the username parameter of the expression rule!IST_UserRecordLink() rather than the label parameter. This issue has been reported to the Appian Product Team. The reference number for this issue is AN-140630.

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the Quick App, click the <Record_Singular> link within the Content column under the Pages section, and then open the Interface object.
Replace the code for the user grid column with the following code:

Note: The best way to find the section of code that must be replaced is to search for UserRecordLink in the SAIL expression mode:

a!gridColumn(
 label: "<User_Field>",
 sortField: "<userfield>",
 value: a!linkField(
 links: {if(isnull(fv!row.<userfield>),{},
 rule!XXXXX_UserRecordLink(
 fv!row.<userfield>,
 XXXXX_FormatName(fv!row.<userfield>)
 )
 )
 }
 )
 )

Affected Versions

This article applies to Appian 19.2 and 19.3.

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, application design, Quick Apps, open issues

KB-2003 Quick App "Trends" tab fails to load when user field added due to invalid value for "links"

Parmida Borhani — Fri, 20 Sep 2019 04:10:04 GMT

Revision 30 posted to Appian Knowledge Base by Parmida Borhani on 9/20/2019 4:10:04 AM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the Quick App, click the <Record_Singular> link within the Content column under the Pages section, and then open the Interface object.
Replace the code for the user grid column with the following code:

Note: The best way to find the section of code that must be replaced is to search for UserRecordLink in the SAIL expression mode:

a!gridColumn(
 label: "<User_Field>",
 sortField: "<userfield>",
 value: a!linkField(
 links: {if(isnull(fv!row.<userfield>),{},
 rule!XXXXX_UserRecordLink(
 fv!row.<userfield>,
 XXXXX_FormatName(fv!row.<userfield>)
 )
 )
 }
 )
 )

Affected Versions

This article applies to Appian 19.2 and 19.3.

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, application design, Quick Apps, open issues

DRAFT KB-XXXX Quick App "Trends" tab fails to load when user field added due to invalid value for "links"

James Lee — Thu, 19 Sep 2019 11:45:00 GMT

Revision 29 posted to Appian Knowledge Base by James Lee on 9/19/2019 11:45:00 AM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the Quick App, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
Replace the code for the user grid column with the following code:

Note: The best way to find the section of code that must be replaced is to search for "UserRecordLink" in the SAIL expression mode:

a!gridColumn(
 label: "<User_Field>",
 sortField: "<userfield>",
 value: a!linkField(
 links: {if(isnull(fv!row.<userfield>),{},
 rule!XXXXX_UserRecordLink(
 fv!row.<userfield>,
 XXXXX_FormatName(fv!row.<userfield>)
 )
 )
 }
 )
 )

Affected Versions

This article applies to Appian 19.2 and 19.3.

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, application design, Quick Apps, open issues

DRAFT KB-XXXX Quick App "Trends" tab fails to load when user field added due to invalid value for "links"

James Lee — Thu, 19 Sep 2019 11:44:40 GMT

Revision 28 posted to Appian Knowledge Base by James Lee on 9/19/2019 11:44:40 AM

Symptoms

After creating a Quick App (New Application --> Create Using Application Builder (Full)), specifying a user field for the form, and submitting a data entry through the quick app, the following error is encountered:

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the Quick App, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
Replace the code for the user grid column with the following code:

Note: The best way to find the section of code that must be replaced is to search for "UserRecordLink" in the SAIL expression mode:

a!gridColumn(
 label: "<User_Field>",
 sortField: "<userfield>",
 value: a!linkField(
 links: {if(isnull(fv!row.<userfield>),{},
 rule!XXXXX_UserRecordLink(
 fv!row.<userfield>,
 XXXXX_FormatName(fv!row.<userfield>)
 )
 )
 }
 )
 )

Affected Versions

This article applies to Appian 19.2 and 19.3.

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, application design, Quick Apps, open issues

DRAFT KB-XXXX Quick App "Trends" tab fails to load when user field added due to invalid value for "links"

James Lee — Thu, 19 Sep 2019 11:43:46 GMT

Revision 27 posted to Appian Knowledge Base by James Lee on 9/19/2019 11:43:46 AM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

The generated quick app interface for the "Trends" tab has a format username expression rule!IST_FormatName(fv!row.<userfield>() that is wrapping the username parameter of the expression rule!IST_UserRecordLink() rather than the label parameter. This issue has been reported to the Appian Product Team. The reference number for this issue is AN-140630.

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
Replace the code for the user grid column with the following code:

Note: The best way to find the section of code that must be replaced is to search for "UserRecordLink" in the SAIL expression mode:

a!gridColumn(
 label: "<User_Field>",
 sortField: "<userfield>",
 value: a!linkField(
 links: {if(isnull(fv!row.<userfield>),{},
 rule!XXXXX_UserRecordLink(
 fv!row.<userfield>,
 XXXXX_FormatName(fv!row.<userfield>)
 )
 )
 }
 )
 )

Affected Versions

This article applies to Appian 19.2 and 19.3.

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, application design, Quick Apps, open issues

DRAFT KB-XXXX Quick App "Trends" tab fails to load when user field added due to invalid value for "links"

James Lee — Thu, 19 Sep 2019 11:43:24 GMT

Revision 26 posted to Appian Knowledge Base by James Lee on 9/19/2019 11:43:24 AM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
Replace the code for the user grid column with the following code:

Note: The best way to find the section of code that must be replaced is to search for "UserRecordLink" in the SAIL expression mode:

a!gridColumn(
label: "<User_Field>",
sortField: "<userfield>",
value: a!linkField(
links: {if(isnull(fv!row.<userfield>),{},
rule!XXXXX_UserRecordLink(
fv!row.<userfield>,
XXXXX_FormatName(fv!row.<userfield>)
)
)
}
)
)

Affected Versions

This article applies to Appian 19.2 and 19.3.

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, application design, Quick Apps, open issues

DRAFT KB-XXXX Quick App "Trends" tab fails to load when user field added due to invalid value for "links"

Parmida Borhani — Thu, 19 Sep 2019 07:20:34 GMT

Revision 25 posted to Appian Knowledge Base by Parmida Borhani on 9/19/2019 7:20:34 AM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
Replace the code for the user grid column with the following code to remediate the issue, as well as perform a null check in case the user field is not set to required. The easiest way to find the section of code that must be replaced is to search for "UserRecordLink" in the SAIL expression mode:

a!gridColumn(
 label: "<User_Field>",
 sortField: "<userfield>",
 value: a!linkField(
 links: {if(isnull(fv!row.<userfield>),{},
 rule!XXXXX_UserRecordLink(
 fv!row.<userfield>,
 XXXXX_FormatName(fv!row.<userfield>)
 )
 )
 }
 )
 )

Affected Versions

This article applies to Appian 19.2 and 19.3.

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, application design, Quick Apps, open issues

DRAFT KB-XXXX Quick App "Trends" tab fails to load when user field added due to invalid value for "links"

Parmida Borhani — Thu, 19 Sep 2019 07:15:06 GMT

Revision 24 posted to Appian Knowledge Base by Parmida Borhani on 9/19/2019 7:15:06 AM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
Replace the code for the user grid column with the following code to remediate the issue, as well as perform a null check in case the user field is not set to required. The easiest way to find the section of code that must be replaced is to search for "UserRecordLink" in the SAIL expression mode:

Affected Versions

This article applies to Appian 19.2 and 19.3.

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, application design, Quick Apps, open issues

DRAFT KB-XXXX Quick App "Trends" tab fails to load when user field added due to invalid value for "links"

Parmida Borhani — Thu, 19 Sep 2019 07:14:31 GMT

Revision 23 posted to Appian Knowledge Base by Parmida Borhani on 9/19/2019 7:14:31 AM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
Replace the code for the user grid column with the following code to remediate the issue, as well as perform a null check in case the user field is not set to required. The easiest way to find the section of code that must be replaced is to search for "UserRecordLink" in the SAIL expression mode:

Affected Versions

This article applies to Appian 19.2 and 19.3.

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, Quick Apps, open issues

DRAFT KB-XXXX Quick app "Trends" tab fails to load when user field added due to invalid value for "links"

James Lee — Wed, 18 Sep 2019 11:47:07 GMT

Revision 22 posted to Appian Knowledge Base by James Lee on 9/18/2019 11:47:07 AM

Symptoms

After creating a quick app (New Application --> Create Using Application Builder (Full)), specifying a user field for the form, and submitting a data entry through the quick app, the following error is encountered:

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
Replace the code for the user grid column with the following code to remediate the issue, as well as perform a null check in case the user field is not set to required. The easiest way to find the section of code that must be replaced is to search for "UserRecordLink" in the SAIL expression mode:

Affected Versions

This article applies to Appian 19.2 and 19.3.

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, Quick Apps, open issues

DRAFT KB-XXXX Quick app "Trends" tab fails to load when user field added due to invalid value for "links"

James Lee — Wed, 18 Sep 2019 11:45:22 GMT

Revision 21 posted to Appian Knowledge Base by James Lee on 9/18/2019 11:45:22 AM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
Add the following code to remediate the issue, as well as perform a null check in case the user field is not set to required:

The easiest way to find the section of code that must be replaced is to search for "UserRecordLink" in the SAIL expression mode.

Affected Versions

This article applies to Appian 19.2 and 19.3.

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, Quick Apps, open issues

DRAFT KB-XXXX Quick app "Trends" tab fails to load when user field added due to invalid value for "links"

James Lee — Wed, 18 Sep 2019 11:44:21 GMT

Revision 20 posted to Appian Knowledge Base by James Lee on 9/18/2019 11:44:21 AM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
Add the following code to remediate the issue, as well as perform a null check in case the user field is not set to required:

Affected Versions

This article applies to Appian 19.2 and 19.3.

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, Quick Apps, open issues

DRAFT KB-XXXX Quick app "Trends" tab fails to load when user field added due to invalid value for "links"

James Lee — Wed, 18 Sep 2019 11:44:01 GMT

Revision 19 posted to Appian Knowledge Base by James Lee on 9/18/2019 11:44:01 AM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
Add the following code to remediate the issue, as well as perform a null check in case the user field is not set to required:

a!gridColumn(
label: "<User_Field>",
sortField: "<userfield>",
value: a!linkField(
links: {if(isnull(fv!row.<userfield>),{},
rule!XXXXX_UserRecordLink(
fv!row.<userfield>,
XXXXX_FormatName(fv!row.<userfield>)
)
)
}
)
) The easiest way to find the section of code that must be replaced is to search for "UserRecordLink" in the SAIL expression mode.

Affected Versions

This article applies to Appian 19.2 and 19.3.

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, Quick Apps, open issues

DRAFT KB-XXXX Quick app "Trends" tab fails to load when user field added due to invalid value for "links"

Parmida Borhani — Wed, 18 Sep 2019 02:40:15 GMT

Revision 18 posted to Appian Knowledge Base by Parmida Borhani on 9/18/2019 2:40:15 AM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
The below code will remediate the issue, as well as perform a null check in case the user field is not set to required:

 a!gridColumn(
 label: "<User_Field>",
 sortField: "<userfield>",
 value: a!linkField(
 links: {if(isnull(fv!row.<userfield>),{},
 rule!XXXXX_UserRecordLink(
 fv!row.<userfield>,
 XXXXX_FormatName(fv!row.<userfield>)
 )
 )
 }
 )
 )

Affected Versions

This article applies to Appian 19.2 and 19.3.

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, Quick Apps, open issues

DRAFT KB-XXXX Quick app "Trends" tab fails to load when user field added due to invalid value for "links"

James Lee — Mon, 16 Sep 2019 12:42:21 GMT

Revision 17 posted to Appian Knowledge Base by James Lee on 9/16/2019 12:42:21 PM

Symptoms

After creating a quick app (New Application --> Create Using Application Builder (Full)) and specifying a user field for the form, the below error is encountered when trying to land on the created "Trends" page, after submitting a data entry through the quick app:

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

The generated quick app interface for the trends tab has a format username expression rule!IST_FormatName(fv!row.<userfield>() that is wrapping the username parameter of the expression rule!IST_UserRecordLink() rather than the label parameter. This issue has been reported to the Appian Product Team. The reference number for this issue is AN-140630.

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
The below code will remediate the issue, as well as perform a null check in case the user field is not set to required:

 a!gridColumn(
 label: "<User_Field>",
 sortField: "<userfield>",
 value: a!linkField(
 links: {if(isnull(fv!row.<userfield>),{},
 rule!XXXXX_UserRecordLink(
 fv!row.<userfield>,
 XXXXX_FormatName(fv!row.<userfield>)
 )
 )
 }
 )
 )

Affected Versions

This article applies to Appian 19.2 and Appian 19.3:

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, Quick Apps

DRAFT KB-XXXX Quick app "Trends" tab fails to load when user field added due to invalid value for "links"

James Lee — Fri, 13 Sep 2019 18:45:28 GMT

Revision 16 posted to Appian Knowledge Base by James Lee on 9/13/2019 6:45:28 PM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
The below code will remediate the issue, as well as perform a null check in case the user field is not set to required:

Affected Versions

This article applies to Appian 19.2 and Appian 19.3:

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, Quick Apps

DRAFT KB-XXXX Quick app "Trends" tab fails to load when user field added due to invalid value for "links"

James Lee — Fri, 13 Sep 2019 18:45:04 GMT

Revision 15 posted to Appian Knowledge Base by James Lee on 9/13/2019 6:45:04 PM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
The below code will remediate the issue, as well as perform a null check in case the user field is not set to required:

Affected Versions

This article applies to Appian 19.2 and Appian 19.3:

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, Quick Apps

DRAFT KB-XXXX Quick app "Trends" tab fails to load when user field added due to invalid value for "links"

James Lee — Fri, 13 Sep 2019 18:44:30 GMT

Revision 14 posted to Appian Knowledge Base by James Lee on 9/13/2019 6:44:30 PM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

The generated quick app interface for the trends tab has a format username expression rule!IST_FormatName(fv!row.<userfield>() that is wrapping the username parameter of the expression rule!IST_UserRecordLink() rather than the label parameter. This issue has been reported to the Appian Product Team. The reference number for this issue is AN-140630.

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
The below code will remediate the issue, as well as perform a null check in case the user field is not set to required:

Affected Versions

This article applies to Appian 19.2 and Appian 19.3:

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, Quick Apps

DRAFT KB-XXXX Quick app "Trends" tab fails to load when user field added due to invalid value for "links"

James Lee — Fri, 13 Sep 2019 18:42:54 GMT

Revision 13 posted to Appian Knowledge Base by James Lee on 9/13/2019 6:42:54 PM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

This issue has been reported to the Appian Product Team. The reference number for this issue is AN-140630.

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
The format username expression rule!IST_FormatName(fv!row.<userfield>() is wrapping the username parameter of the expression rule!IST_UserRecordLink() rather than the label parameter. The below code will remediate the issue, as well as perform a null check in case the user field is not set to required:

Affected Versions

This article applies to Appian 19.2 and Appian 19.3:

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, Quick Apps

DRAFT KB-XXXX Quick app "Trends" tab fails to load when user field added due to invalid value for "links"

James Lee — Fri, 13 Sep 2019 18:40:40 GMT

Revision 12 posted to Appian Knowledge Base by James Lee on 9/13/2019 6:40:40 PM

Symptoms

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

This issue has been reported to the Appian Product Team. The reference number for this issue is AN-140630.

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
The format username expression rule!IST_FormatName(fv!row.<USER_FIELD>() is wrapping the username parameter of the expression rule!IST_UserRecordLink() rather than the label parameter. The below code will remediate the issue, as well as perform a null check in case the user field is not set to required:

Affected Versions

This article applies to Appian 19.2 and Appian 19.3:

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, Quick Apps

DRAFT KB-XXXX Quick app "Trends" tab fails to load when user field added due to invalid value for "links"

James Lee — Fri, 13 Sep 2019 18:38:47 GMT

Revision 11 posted to Appian Knowledge Base by James Lee on 9/13/2019 6:38:47 PM

Symptoms

After creating a quick app (New Application --> Create Using Application Builder (Full)) and specifying a user field for the form, the below error is encountered when trying to land on the created "Trends" page after submitting a data entry through the quick app:

"Expression evaluation error at function a!gridField [line XXX]: A grid component [label=“null”] has an invalid value for “columns”. A grid column [label=“<USER_FIELD>”] has encountered an error. Expression evaluation error at function a!linkField [line XXX]: An AnyLinkField component [label=“”] has an invalid value for “links”. The array of links cannot have null items."

Cause

This issue has been reported to the Appian Product Team. The reference number for this issue is AN-140630.

Workaround

Navigate to the interface for the "Trends" tab *_All<Record_Singular>: to find the interface, open the site object for the quick app, click the "<Record_Singular>" link within the Content column under the Pages section, and then open the Interface object.
The format username expression rule!IST_FormatName(fv!row.<USER_FIELD>() is wrapping the username parameter of the expression rule!IST_UserRecordLink() rather than the label parameter. The below code will remediate the issue, as well as perform a null check in case the user field is not set to required:

Affected Versions

This article applies to Appian 19.2 and Appian 19.3:

Last Reviewed: September 2019

Tags: known issues, expression rules, interfaces, Quick Apps