Complex Validation

Hello Experts,
I have table with fields like customer, unit etc..
Customer field is Not a unique field.
Each customer should be assigned to ONLY one UNIT.
when the same customer is entered if another unit is selected then Import should fail.
For Ex:
File 1 has the following data init..
Cust   | Unit
Xyz   | raw-materials
Vjk    |   storage
Once this data is imported.
File 2 has
Cust   | Unit
Xyz   |   storage
jhu     |   storage
Then this record (Xyz   |   storage ) should fail because Xyz should always be assigned to Raw-materials.
How can i create the Validation which checks the duplicates and verifies the Unit field value.

Hi Eva,
As you don't want to maintain it as Unique field.
As per your requirement, i also feel this thing you can take care during import of data. In Import Manager, upload a source file with New as well as with existing customers records in MDM. Now after doing all field and value mapping. In Match Record tab,Select your Matching field as Customer only. So correspondingly, in Default import action--> For newly created record (Customer: Jhu), Select default import Action as Create and for already existing customer Match Type: Exact e.g. Xyz Select Default import action tab as Skip which will fail this customer to update again. After this save map and check whether this map works fine for further coming source files or not.
I don't have MDM Access so cant check it. Kindly revert with result if this helps you.
e.g. first time you have source file as
Cust | Unit
Xyz | Null
Next time again if cust Xyz comes with some Unit say raw-materials it will not update this record though for already existing record it has unit value as Null.
Note: It will not create customer(duplicate) with same value xyz irrespective of Unit value fill or not. So use it wisely if it fits your requirement because it will not check for Unit.
Alternative: If the above solution does not fit you and as you are checking this thing on the fly so use of BPM workflow with BRM can definitely help you where you need to search for the customer and Unit using a custom application which will search in mdm repository. if already exists in mdm so you can roll back that customer record else commit record in mdm.
Regards,
Mandeep Saini
Edited by: Mandeep Singh Saini on Dec 10, 2010 9:00 PM

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Regards,
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I have use John's solution, it works well !
Sorry vinod_t_krishnan i am good with java but i don't know how to use well EL Expressions so I did not try your method...
The code if so is interested...
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Hi all,
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Any real time complex validations and assignments

Hi frds,
Any one can share few real time complex validations and Assignments on product object?
Thanks in advance
Regards.

Rajeev,
I do not have real time validation exaples. There are couple of blogs on SDN
search for
MDM Expression Engine
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Parsing and Validating Numbers
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Regards
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Thanks in advance

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Best Regards,
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Experts,
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pls assign points to say thanks.

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Hi,
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In short, where is the best way to put validation logic? And (how) can this be done without duplicating (to much) logic?
Regards,
Peter
P.S.
Does anyone know how to retrieve the context of an SQL exception?

Do you users have access to the data/tables outside
of using your application? (as in using sqlplus?)Not at the moment.
Ideally the database should just be going
constraint--data integrity type of checks. The
business rules would be in the business layer not
persitance layer..So in this case, they would be in
the bc4j entity objects.. Well most of them are simple integrity constraints, but sometimes we have to check things using triggers which are way more complicated and need extensive database access. It's more logical to do that in the database. If the trigger runs into a problem it raises an application error. We are hoping we can use this error somehow in our application.
That assumes that the only way a user can modify that
data is through your application only.Well it is, and if another application is written for it the BC4J entities etc. will probably be re-used, but like I said there are other reasons for not having all the business-rules in the BC4J layer.
by the way, are you migrating an existing application
that already has all the business rules in the
database?No, it's a brand new application, but we started out with defining a lot of business rules in the database because that seems a more logical place to put them (to us). I understand that some business-rules can better be implemented in the BC4J entities, but it's not that easy for every business rule we have.
Regards,
Peter

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