Sorry for my english, but i hope you'll understand me :P
I'm trying to create new TSQLQuery component in code, without placing it on form. I wrote that code:
var
sql:tsqlquery;
pole:TFMTBCDField;
....
sql:=tsqlquery.Create(self);
sql.SQLConnection:=ddm.konekszyn;
sql.SQL.Text:='SELECT COUNT(idrap) FROM raporty WHERE idkier="'+lvkierowcy.Selected.Caption+'";';
pole:=TFMTBCDField.Create(self);
pole.Name:='sqlilerap';
pole.FieldName:='COUNT(idrap)';
pole.FieldKind:=fkData;
pole.DisplayLabel:='COUNT(idrap)';
sql.Fields.Add(pole);
sql.Open;
showmessage(sql.FieldByName('COUNT(idrap)').AsString);
sql.Free;
pole.Free;
but i'm getting exception when i try to access data:
First chance exception at $75999617. Exception class EDatabaseError with message 'Field 'COUNT(idrap)' has no dataset'. Process htstrm2.exe (2308)
What should I do ?
Don't even make a field. Queries such as this return one and only one field. So just reference from the fields array:
var
sql:tsqlquery;
....
sql:=tsqlquery.Create(self);
sql.SQLConnection:=ddm.konekszyn;
sql.SQL.Text:='SELECT COUNT(idrap) FROM raporty WHERE idkier="'+lvkierowcy.Selected.Caption+'";';
sql.Open;
showmessage(sql.fields[0].AsString);
sql.Free;
Your database driver reports the empty field name for the aggregate expression.
Alias your field:
sql:=tsqlquery.Create(self);
sql.SQLConnection:=ddm.konekszyn;
sql.SQL.Text:='SELECT COUNT(idrap) AS cnt FROM raporty WHERE idkier="'+lvkierowcy.Selected.Caption+'";';
pole:=TFMTBCDField.Create(self);
pole.Name:='sqlilerap';
pole.FieldName:='cnt';
pole.FieldKind:=fkData;
pole.DisplayLabel:='cnt';
sql.Fields.Add(pole);
sql.Open;
showmessage(sql.FieldByName('cnt').AsString);
sql.Free;
pole.Free;
You must explicitly assign the dataset to the field, try adding this line
pole.DataSet:=sql;
Bye.
Alias the column being returned. You can then access it by that aliased name:
sql.SQL.Text:='SELECT COUNT(idrap) AS iDrapCount FROM raporty WHERE dkier
="'+lvkierowcy.Selected.Caption+'";';
....
pole.FieldName := 'iDrapCount';
Try adding this line to your query:
AND idrap <> nil
Related
DATA: t_mara type STANDARD TABLE OF mara WITH EMPTY KEY.
DATA(t_data1) = VALUE ty_data( FOR s_mara IN t_mara ( s_mara–matnr ) ).
I am trying to implement a similar code using FOR statement but I am getting an error that the field is unknown in the work area even though it would be declared inline.
Can you please let me know what went wrong? This is my first time I am facing this error on FOR loop.
Not sure because you are not providing too much detail but try this:
DATA t_mara type STANDARD TABLE OF mara WITH EMPTY KEY.
DATA(t_data1) = VALUE ty_data( FOR s_mara IN t_mara ( matnr = s_mara-matnr ) ).
i'm facing issue in xpath-I need do a check two attribute values, if the condition satisfies need to do hard code my own value. Below is my xml.
I need to check the condition like inside subroot- if ItemType=Table1 and ItemCondition=Chair1 then i have to give a hard coded value 'Proceed'( this hard coded value i will map to target side of datamapper).
<Root>
<SubRoot>
<ItemType>Table1</ItemType>
<ItemCondition>Chair1</ItemCondition>
<ItemValue>
.......
</ItemValue>
</SubRoot>
<SubRoot>
<ItemType>Table2</ItemType>
<ItemCondition>chair2</ItemCondition>
<ItemValue>
.......
</ItemValue>
</SubRoot>
....Will have multiple subroot
</Root>
I have tried to define rules as below, but it is throwing error
Type: String
Context:/Root
Xpath: substring("Proceed", 1 div boolean(/SubRoot[ItemType="Table1" and ItemCondition="Chair1"]))
But it is throwing error like
net.sf.saxon.trans.XPathException: Arithmetic operator is not defined for arguments of types (xs:integer, xs:boolean)
Is there any other shortcut way to perform this.Could you please help me, i have given lot more effort. Not able to resolve it. Thanks in advance.
I am not sure where you are applying this but the XPath expression you are looking for is:
fn:contains(/Root/SubRoot[2]/ItemCondition, "chair") and fn:contains(/Root/SubRoot[2]/ItemType, "Table")
So here is an example returning "Proceed" or "Stop" as appropriate:
if (fn:contains(/Root/SubRoot[1]/ItemCondition, "Chair") and fn:contains(/Root/SubRoot[2]/ItemType, "Table")) then 'Proceed' else 'Stop'
To implement the above condition , i was initially tired to do in xpath, gave me lot of error. I have implemented by simple if else condition in script part of data mapper
if ( (input.ItemType == 'Table') and (input.ItemCondition == 'chair')) {
output.Item = 'Proceed'}
else {
output.Item = 'Stop '};
Make sure about your precedence. Example, Here in the xml structure( or converted POJO) ItemType has to be checked first then followed with ItemCondition.
&& not seems to be working for me, change to 'and' operator
If you were first time trying to implement the logic. It may help you.
There were three similar questions in StackOverFlow but none gave an answer..
If have found why this error in occurring but don't know the fix.
I am using Strongly Typed Dataset for my project which is created as a dll for DAL.
I have added the Sql Server Table into this dataset using the designer and has created a DataAdapter
It works fine when i insert using DataTableAdapter
daLabTest.Insert(txtLabTestId.Text, cmbLabTestType.Text, cmbTestName.Text, txtLabFees.Text, dtpLabEffDate.Value)
but when i want to show the data from the table in a combobox or gridview i get this error.
i told that i found out what the problem is, I just previewed the data using DataSet designer and found out that the Function returns data like this...
The query i wrote to view this in dataset is
Select distinct(TestType) from LabTestTypes
so this should return only one column but the dataset is returning 5 columns but others as null, and the TestName column is a primary which should not be null when returned, so the problem exists..
To resolve this i tried to change the NullValue & AllowDBNull property to [Empty] and true respectively but that didn't worked for me.
Please help me in this...
That overly general constraint exception is nasty, where's the InnerException after so many complaints?!
This template may help identify the problem row and column but a "Fill" version of the query function is needed. E.g. GetDistinct*() --> Fill*(). Then a table can be created and interrogated for the row's error text.
SomeTable tTable = new SomeTable()
try {
// sorry, if you have a GetData, change to the fill version
someTable.FillByActiveLogin(tTable, loginName);
} catch (System.Data.ConstraintException constrExc) {
System.Data.DataRow[] rowsErr = tTable.GetErrors();
for (int i = 0; i < rowsErr.Count(); i++)
if (rowsErr[i].HasErrors)
Dbg.WriteLine(rowsErr[i].RowError);
}
(Thanks Michael S for this hint whoever/wherever you are!)
I got this error in a function from a DLL that uses a stored procedure. The procedure did not return all the fields in the table. One of the fields excluded was one that cannot be null. That apparently caused the constraint exception. When I changed the procedure and the DLL to include that field, the exception went away.
After spending ages on this problem myself, I have resolved it modifying the query in the dataset to return a dummy value (that can be ignored) for each key field that is not required in the output.
So your query would become...
Select distinct TestType, 1 as ID, "Dummy" as TestName, "Dummy" as TestFees, "Dummy" as TestDate
from LabTestTypes
I have been struggling with this, i have two models and showing data in Cgridview with one model, this model contains some id's whose values are in different table
So, i have added
'value'=> 'TblAreaoflaw::model()->FindByPk($data->typeoflaw)->areaoflaw'
which is giving this error
"Trying to get property of non-object"
Might be due to this reason that the some records doesn't exist in the TblAreaoflaw. Can't we check in this line through isset?
When i put static value, it work well, like
'value'=> 'TblAreaoflaw::model()->FindByPk(5)->areaoflaw',
Could anyone please help
thanks a lot
The error you get is because this expression TblAreaoflaw::model()->FindByPk($data->typeoflaw) is returning null. This means that you are effectively trying to get null->areaoflaw which won't work (this is what the error message "Trying to get property of non-object" clarifies).
My best guess is that $data->typeoflaw returns a non-existing primary key for the TblAreaoflaw model.
Make sure :
TblAreaoflaw is actually a model, I doubt its Areaoflaw
You have database specified primary key which is the id (5) you are passing
Try:
'value'=> '(TblAreaoflaw::model()->FindByPk($data->typeoflaw)->areaoflaw) ?
: "default or null value"'
Obviously substitute the null string to whatever you want. You may need to adjust the condition to use !empty() or similar, but see how it goes. (And if you do that or aren't using PHP 5.3, use the full ternary expression.)
How can I use "Expression.Not" with text field?
I need to select all records from NHQuestionCount except "ktest"
for example this code return runtime error
NHQuestionCount[] stats = NHQuestionCount.FindAll(Order.Asc("NameFull"), Expression.Not(Expression.Eq("NameFull", "ktest")));
I can't comment on the rest of your code, but your use of Expression is exactly right.