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• Use the switch() function
• Use the forEach() function

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Using switch() to apply multiple tests

• Create a new model: Attribute Scripting
• Drag the datasource CRM onto this model
• From the datasource open the schema browser, find the table SOURCE_BANK_ACCOUNT_TRANS and create a database collector from it
• Create a stream from this database collector – remember to use the  button in the hover menu so that the stream attributes are automatically configured
• Open the help for the switch() function:
  • Press Open the button section - Attribute Functions in the left-hand menu bar of PhixFlow repository browser – a list of all attribute functions available in PhixFlow will appear
  • Double - click on the entry for switch to bring up the help page
• Add an attribute to this stream to hold a description of the transaction type:
  • Name: TransactionTypeDesc

  • Expression: work out the transaction type description from TRANSACTION_TYPE, using a switch() statement, according to the rules below – use the examples in the help for switch() to get started

    TRANSACTION_TYPE	Description
    1	"Direct Debit"
    2	"Standing Order"
    3	"ePayment"
    4	"Cheque"
    Any other value	"Unknown"

    
    

• Run the stream and check that your translation of transaction type to transaction type description is correct

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Using forEach() to handle lists

• Create an aggregate stream, with name Bank Account Summary
• Add a pipe from the stream you created in the previous exercise (this is probably called SOURCE_BANK_ACCOUNT_TRANS) to Bank Account Summary
• Add to the pipe the grouping:
  • ACCOUNT_NUM
• Drag the attribute ACCOUNT_NUM into Bank Account Summary from either the pipe or the input stream
• Add an attribute:
  • Name: TotalPosTrans
  • Type: Float
  • Expression: using a forEach loop, add up the total of all positive transcationstransactions, and store it in this attribute
• Run Bank Account Summary to test this new attribute
• When this is working, update TotalPosTrans to also calculate the total of negative transcationstransactions, and the total of all transcations transactions – and hold them in local variables ($variables)
• Add two further attributes – TotalNegTrans and TotalTrans - that allow you use these to store the values of all negative transactions and all transcations transactions that you calculated in TotalPosTrans
• Run Bank Account Summary again to test the new attributes

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• Use the switch() function
• Use the forEach() function

...

• Press the button Image Removed in the left-hand menu bar of PhixFlow – a list of all attribute functions available in PhixFlow will appear
• Double-click on the entry for switch to bring up the help page

...

Expression: work out the transaction type description from TRANSACTION_TYPE, using a switch() statement, according to the rules below – use the examples in the help for switch() to get started

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• Create an aggregate stream, with name Bank Account Summary
• Add a pipe from the stream you created in the previous exercise (this is probably called SOURCE_BANK_ACCOUNT_TRANS) to Bank Account Summary
• Add to the pipe the grouping:
  • ACCOUNT_NUM
• Drag the attribute ACCOUNT_NUM into Bank Account Summary from either the pipe or the input stream
• Add an attribute:
  • Name: TotalPosTrans
  • Type: Float
  • Expression: using a forEach loop, add up the total of all positive transcations, and store it in this attribute
• Run Bank Account Summary to test this new attribute
• When this is working, update TotalPosTrans to also calculate the total of negative transcations, and the total of all transcations – and hold them in local variables ($variables)
• Add two further attributes – TotalNegTrans and TotalTrans - that allow you to store the values of all negative and all transcations that you calculated in TotalPosTrans
• Run Bank Account Summary again to test the new attributes