Just a quick troubleshooting gotcha:
AOT, Angular2 compile error:
Error: Error encountered resolving symbol values statically. Expression form not supported (position 28:20 in the original .ts file), resolving symbol ToolsModule in C:/Workspaces/.../app/tools/tools.module.ts
leading comma in array values
declarations: [
, MainComponent <<<< Issue.
, SubComponent
]
Jessel Aquing - Caracal Technologies
Sunday, June 25, 2017
Monday, May 08, 2017
The equivalent to lambda expressions in Angular TypeScript (Javascript)
For filtering a list in C# we have :
var filteredList = List.Where(l => l.active);]
JS equivalent :
var filteredList = list.filter((l) => { return l.active == true; });
C# - Test for list values
var isListPopulated = List.Any( l => l.amount >= 0);
JS - Test for list values
var isListPopulated = list.filter((l) => { return l.amount >= 0; }).length > 0;
C# - Get first list item
var topItem = List.First( l => l.amount >= 0);
JS - Get first list item
var topItem = list.filter((l) => { return l.amount >= 0; })[0];
NB C# First() throws an exception if there is no match. As does the JS equivalent.
C# - Get first list item or null if none exist
var topItem = List.FirstOrDefault( l => l.amount >= 0);
JS - Get first list item or null if none exist (combo of the Any + First)
var filteredList = list.filter((l) => { return l.amount >= 0; });var topItem = filteredList.length > 0 ? filteredList[0] : null;
Thursday, April 27, 2017
Resolving "Invalid column name" Exception
"System.Data.SqlClient. SqlException: Invalid column name 'Client_ClientId'."
A valid relationship to the Client entity model could not be determined. In our case, there were duplicate virtual references in the Client model (table) to the Document model (table).
The Document model had the following properties:
public Nullable ClientId { get; set; }
public virtual Client Client { get; set; }
However, the Client model had the following duplicate properties:
public virtual ICollection ClientDocuments { get; set; }
public virtual ICollection Documents { get; set; }
Removal of the duplicate eliminated the exception message.
"System.Data.SqlClient.
A valid relationship to the Client entity model could not be determined. In our case, there were duplicate virtual references in the Client model (table) to the Document model (table).
The Document model had the following properties:
public Nullable
public virtual Client Client { get; set; }
However, the Client model had the following duplicate properties:
public virtual ICollection
public virtual ICollection
Removal of the duplicate eliminated the exception message.
Saturday, February 18, 2017
Angular2 rollup project errors
Receiving the following error message in the Task Runner Explorer window when rolling up an Angular2 app using Gulp (VisualStudio 2015)
To fix the following error,
var charts_module_2 = require('./components/charts/charts');
exports.ChartsModule = charts_module_2.ChartsModule;
Inside of
\node_modules\ng2-charts\ng2-charts.js
To fix the following error,
For help fixing this error see https://github.com/rollup/rollup/wiki/Troubleshooting#name-is-not-exported-by-module
To fix the following error,
var file_uploader_module_2 = require('./components/file-upload/file-uploader.class');
exports.FileUploader = file_uploader_module_2.FileUploader;
Inside of
\ node_modules\ng2-file-upload\ng2-file-upload.js (2.2.1)
To fix the following error,
Unhandled promise rejection (rejection id: 1): Error: 'ChartsModule' is not exported by node_modules\ng2-charts\ng2-charts.jsAdd the following lines:
var charts_module_2 = require('./components/charts/charts');
exports.ChartsModule = charts_module_2.ChartsModule;
Inside of
\node_modules\ng2-charts\ng2-charts.js
To fix the following error,
Unhandled promise rejection (rejection id: 1): Error: 'MapsAPILoader' is not exported by node_modules\angular2-google-maps\core\index.js
Add the following lines:
var core_module_2 = require('./core.umd');
exports.MapsAPILoader = core_module_2.MapsAPILoader;
exports.MapsAPILoader = core_module_2.MapsAPILoader;
Inside of
node_modules/angular2-google-maps/core/index.js
For help fixing this error see https://github.com/rollup/rollup/wiki/Troubleshooting#name-is-not-exported-by-module
To fix the following error,
Unhandled promise rejection (rejection id: 1): Error: 'FileUploader' is not exported by node_modules\ng2-file-upload\index.jsAdd the following lines:
var file_uploader_module_2 = require('./components/file-upload/file-uploader.class');
exports.FileUploader = file_uploader_module_2.FileUploader;
Inside of
\ node_modules\ng2-file-upload\ng2-file-upload.js (2.2.1)
Tuesday, January 17, 2017
Angular2 issues with Vaadin Combo box.
Using [ngModel] and (selected-item-changed) to set selected id value. not using [(ngModel)]
selected-item-changed fires 3 times:
1) with 1st item in list - no matter what selection
2) same value as first
3) null value
result: no selection is made.
findings:
item-value-path has wrong path.
selected-item-changed fires 2 times:
1) with correctly selected value
2) null value
result: no selection is made.
findings:
selected-item-changed handler was (re)setting the selected value to an invalid property, resulting in value being null
a.selected-item-changed fires 2 times:
1.a) with correctly selected value
2.a) with 1st item in list
result: wrong selection is made.
b.selected-item-changed fires 2 times:
1.b) with previous selection
2.b) with correct value
result: correct selection is made.
c.selected-item-changed fires 1 time:
1.c) with correct value
findings:
item-value-path was using a key that could be null for selected item. selected-item-changed handler was (re)setting the selected value to correct value again, resulting in second change event firing. If key was valid and unique, selection was made correctly.
Wednesday, July 01, 2015
A Remote action is reporting a 'not found' exception.
The remote action is passing an incorrect number of parameters or one of the parameters is NULL.
If the signature looks good, it is likely a null reference causing this error.
Visualforce.remoting.Manager.invokeAction(
'traction_Page_Controller.submitForm',
JSON.stringify(formData),
function(result, event) {
if (event.type !== 'exception') {
console.log(result);
} else {
console.log('exception *!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!*!');
}
}
);
Visualforce Remoting Exception: Method 'submitForm' not found on controller traction_Page_Controller. Check spelling, method exists, and/or method is RemoteAction annotated
Tuesday, July 08, 2014
Adding, Removing, Re-Adding SQL accounts
Management Studio
[Server\Instance]>Security>Logins >> Add Login
SQL
SELECT SUSER_SID('<<username>>')
SELECT * FROM sys.server_principals SP where SID = <<user sid>>
Management Studio
[Server\Instance]>Databases>Object>Security>Users>User >> Delete User (Repeat as necessary)
[Server\Instance]>Security>Users>User >> Delete User
SQL
sp_droplogin <<username>>
SELECT SUSER_SID('<<username>>')
SELECT * FROM sys.server_principals SP where SID = <<user sid>>
Management Studio
[Server\Instance]>Security>Logins >> Add Login
Management Studio
[Server\Instance]>Security>Logins >> Add Login
SQL
SELECT SUSER_SID('<<username>>')
SELECT * FROM sys.server_principals SP where SID = <<user sid>>
Management Studio
[Server\Instance]>Databases>Object>Security>Users>User >> Delete User (Repeat as necessary)
[Server\Instance]>Security>Users>User >> Delete User
SQL
sp_droplogin <<username>>
SELECT SUSER_SID('<<username>>')
SELECT * FROM sys.server_principals SP where SID = <<user sid>>
Management Studio
[Server\Instance]>Security>Logins >> Add Login
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