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If field = Null then use a different field


If field = Null then use a different field

By : user2948283
Date : November 14 2020, 04:48 PM
it helps some times I have written some Sql code to display all clients who's offers are about to expire in the next 90 days by using the dateOffered field. However there is another field in the database called OfferExpirydate I would use this field however it it not always filled out.
code :
COALESCE(col1, col2, ...)


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Django South - turning a null=True field into a null=False field

Django South - turning a null=True field into a null=False field


By : Fuad Agayev
Date : March 29 2020, 07:55 AM
may help you . You should write first a data migration: http://south.aeracode.org/docs/tutorial/part3.html and then make the schemamigration.
Need to get a field editable depending on a field content in EXT.NET. Get this.field.msgTarget is null or not an object

Need to get a field editable depending on a field content in EXT.NET. Get this.field.msgTarget is null or not an object


By : solomon
Date : March 29 2020, 07:55 AM
it helps some times I try to use your example to dynamically add/remove editor and get this error: this.field.msgTarget is null or not an object error. I'm new to the ext.net - could somebody help me? , Jenny , You can just return false to before event.
code :
var setEditor = function (e) {
          var column = e.grid.getColumnModel().columns[e.column],
          ed = column.getCellEditor(e.row);
          if (ed && (e.value != '')) {
              return false;
          }
      }
Django: Email field in form returning 'this field cannot be null/this field cannot be blank' even though there's an addr

Django: Email field in form returning 'this field cannot be null/this field cannot be blank' even though there's an addr


By : Ahmed Mohsen
Date : March 29 2020, 07:55 AM
I wish this help you You've commented out the last line of the clean_email method, where it returns the value, so it returns None instead. The return value from that method is used as the value of the field, so you really need to return the actual email value.
(Really, when you're debugging something like this and it says "email cannot be blank", you should start by investigating why the field is being reported as blank, rather than fixing the model so that it can be.)
VB.Net Select from Datatable: Order by Field 1, OR by Field 2 if Field 1 is null?

VB.Net Select from Datatable: Order by Field 1, OR by Field 2 if Field 1 is null?


By : Clara Pardue
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , What you're describing is an "order by, then by" approach. In LINQ I believe it's accomplished with a simple comma-separated list of order fields:
code :
Order By email.Field(Of DateTime)("GenDateScheduled"), email.Field(Of DateTime)("GenDateCreated")
MySQL Update NULL Field with Field=Field+1 Strange Behavior

MySQL Update NULL Field with Field=Field+1 Strange Behavior


By : egorvlgavr
Date : March 29 2020, 07:55 AM
hop of those help? not sure if u face this strange behavior on MySQL table before: when the table field is default as NULL, I do a simple UPDATE statement run no problem. if I were to issue field=field+1 then the value is not update. Then what i did is to insert 0 into the field and run the same field=field+1 again then it works. , If you have a null field then for update use.
code :
//structure
UPDATE TableName SET column = IFNULL(column, 0) + 1 WHERE ...

//original
UPDATE table1 SET field = IFNULL(field, 0) + 1 WHERE id=123;
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