COC ,Access to another data source from init data source method on form

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Posted on by Ahmed Osama Ibrahim

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Hello..

form has two data sources, I created a class Extended the form data source init method using the COC, and added some ranges ,also I need to access the other data source in the form ,to know the active record

Thanks all .

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RE: COC ,Access to another data source from init data source method on form

Thanks Martin, I've updated the code.
Martin Dráb 232,858 Most Valuable Professional on at

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RE: COC ,Access to another data source from init data source method on form

I've seen this pattern in vendor's code and I don't understand it's purpose:

FormDataObject formDataObject = any2Object(this) as FormDataObject;

Why don't you simply refer to 'this'?

any2Object() isn't useful, because 'this' already is an object instance.

'as FormDataObject' doesn't look useful either. No casting isn't needed, AFAIK, and we also don't need to check whether the current object has the right type.
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RE: COC ,Access to another data source from init data source method on form

Hi Ahmed

I see this is an old post, but just in case it helps someone else ...

I had a similar requirement where I had to access datasource 1 (let's call it that), whilst extending the 'modified' field on datasource 2. This is the code I used to achieve this:

public void modified() { FormDataSource dataSource2 = this.datasource(); next modified(); QueryRun queryRun = dataSource2.queryRun(); Table1 table1 = queryRun.get(tableNum(Table1)); }
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WillWU 22,352 on at

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RE: COC ,Access to another data source from init data source method on form

Hi Ahmed Osama,

The code "FormDataSource smmBusRelTable_ds = this.formRun().dataSource(formDataSourceStr(PurchEditLines, PurchParmUpdate));" doesn't make any sense here.

You could try to use OnInitialized eventhandler of your formdatasource.
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Martin Dráb 232,858 Most Valuable Professional on at

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RE: COC ,Access to another data source from init data source method on form

You're in init() method - no data has been loaded from database at this point. Loading of data happens later, after the data source is initalized and executeQuery() gets called. That's why the table buffer is always at this point.
Ahmed Osama Ibrahim 332 on at

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RE: COC ,Access to another data source from init data source method on form

Same issue , can't access to the other DS

[ExtensionOf(formdatasourcestr(PurchEditLines, InventDim))] final class BT_PurchEditLines_Form_Extension { public void init() { QueryBuildDataSource qbds,qbdsUser,qbdsLocation,qbdsInventDim; PA_WarehousesUsers PA_WarehousesUsers; InventLocation inventlocation; PurchParmUpdate PurchUpdate; PurchUpdate qty; FormDataSource smmBusRelTable_ds = this.formRun().dataSource(formDataSourceStr(PurchEditLines, PurchParmUpdate)); PurchUpdate = smmBusRelTable_ds.cursor(); next init(); str user = curUserId(); select PA_WarehousesUsers where PA_WarehousesUsers.UserId == user; if(PA_WarehousesUsers )//&& purchParmUpdate.SpecQty == PurchUpdate::PackingSlip) { qbds = this.query().dataSourceTable(tableNum(InventDim)); qbdsUser = qbds.addDataSource(tableNum(PA_WarehousesUsers)); qbdsUser.addLink(fieldNum(PA_WarehousesUsers, InventLocationId), fieldNum(InventDim, InventLocationId)); qbdsUser.addRange(fieldnum(PA_WarehousesUsers, UserId)).value(queryValue(user)); } } }