Need help with creating custom form

Question

hi all,
i'm working on creating a new form. it has 2 blocks for 2 tables. headers and lines tables. the headers table mostly have columns that are id's from other tables. i.e. customer_id, location_id etc.. in my screen, obviously i would not show the id's. i'll display the descriptions / names of the id's instead like customer_name for customer_id... but in order to do this i created a table that joins more than 2 tables. so in the block query data source name, i enter the name of this view.. then i add a ON-INSERT, ON-UPDATE, ON-DELETE triggers at block level and i call the corresponding package which does the insert, update and delete. i'm able to insert but update and delete causes a problem. "ORA-01445: cannot select ROWID from, or sample, a join.. ".. i'm thinking the reason is that when the form does an update or delete, it locks the record which causes the error.. also the reason i need the view is because i need to be able to query the customer_name in the screen instead of the customer_id... what i can't figure out is how i can make this work... or a work-around may be...
can anyone help.
thanks

Answer 1

Matt Rasmussen wrote:
You're right that the form is locking the record so you just need to control how it locks the record with an on-lock trigger. From the Oracle Applications Developer's Guide:
page 3-9:
When basing a block on a view, you must code ON–INSERT, ON–UPDATE, ON–DELETE, and ON–LOCK triggers to insert, update, delete, and lock the root table instead of the view.
Most of the on-lock triggers I have written follow this template:
<pre>     SELECT     field1, field2, field3
     INTO     :block.field3, :block.field2, :block.field3
     FROM     view
     WHERE     rowid = :block.row_id
     FOR UPDATE OF field1, field2, field3;</pre>
I think once you've added this trigger, your form will work the way you want it.hi,
i tried your suggestion but still get the same error.. anyways, here are the details of what i have so far.
here's my table.
CREATE TABLE XXPN_VR_VOL_HEADERS_ALL
  VOL_HEADER_ID     NUMBER,
  CUSTOMER_ID       NUMBER,
  LEASE_ID          NUMBER,
  LOCATION_ID       NUMBER,
  VAR_RENT_ID       NUMBER,
  PERIOD_SET_NAME   VARCHAR2(15 BYTE),
  PERIOD_NAME       VARCHAR2(15 BYTE),
  IMPORT_FLAG       VARCHAR2(1 BYTE),
  IMPORT_DATE       DATE,
  CALC_TYPE         VARCHAR2(30 BYTE),
  PASSTHROUGH_FLAG  VARCHAR2(1 BYTE),
  COMMENTS          VARCHAR2(2000 BYTE),
  CREATED_BY        NUMBER,
  CREATION_DATE     DATE,
  LAST_UPDATED_BY   NUMBER,
  LAST_UPDATE_DATE  DATE
);here's my view.
create or replace view xxpn_vr_vol_headers_v ( row_id
                                              ,vol_header_id
                                              ,customer_id
                                              ,customer_name
                                              ,lease_id
                                              ,lease_name
                                              ,lease_number
                                              ,location_id
                                              ,location_code
                                              ,var_rent_id
                                              ,var_rent_number
                                              ,period_set_name
                                              ,period_name
                                              ,import_flag
                                              ,import_date
                                              ,calc_type
                                              ,passthrough_flag
                                              ,created_by
                                              ,creation_date
                                              ,comments
                                              ,last_updated_by
                                              ,last_update_date )
as
  select xvvha.rowid
        ,xvvha.vol_header_id
        ,xvvha.customer_id
        ,hp.party_name
        ,xvvha.lease_id
        ,pl.name
        ,pl.lease_num
        ,xvvha.location_id
        ,loc.location_code
        ,xvvha.var_rent_id
        ,pvr.rent_num
        ,xvvha.period_set_name
        ,xvvha.period_name
        ,xvvha.import_flag
        ,xvvha.import_date
        ,xvvha.calc_type
        ,xvvha.passthrough_flag
        ,xvvha.created_by
        ,xvvha.creation_date
        ,xvvha.comments
        ,xvvha.last_updated_by
        ,xvvha.last_update_date
    from xxpn_vr_vol_headers_all xvvha
        ,hz_parties hp
        ,pn_leases_all pl
        ,pn_locations_all loc
        ,pn_var_rents_v pvr
   where -1 = -1
     and xvvha.customer_id = hp.party_id (+)
     and xvvha.lease_id = pl.lease_id (+)
     and xvvha.location_id = loc.location_id (+)
     and xvvha.var_rent_id = pvr.var_rent_id (+);here's my ON-UPDATE trigger block level
begin
  xxpn_vr_vol_data_pkg.update_vr_vol_hdr_data ( p_vol_header_id     => :XXPNVRVOLHDRS.vol_header_id
                                               ,p_customer_id       => :XXPNVRVOLHDRS.customer_id
                                               ,p_lease_id          => :XXPNVRVOLHDRS.lease_id
                                               ,p_location_id       => :XXPNVRVOLHDRS.location_id
                                               ,p_var_rent_id       => :XXPNVRVOLHDRS.var_rent_id
                                               ,p_period_set_name   => :XXPNVRVOLHDRS.period_set_name
                                               ,p_period_name       => :XXPNVRVOLHDRS.period_name
                                               ,p_import_flag       => :XXPNVRVOLHDRS.import_flag
                                               ,p_passthrough_flag  => :XXPNVRVOLHDRS.passthrough_flag
                                               ,p_comments          => :XXPNVRVOLHDRS.comments
                                               ,x_last_updated_by   => :XXPNVRVOLHDRS.last_updated_by
                                               ,x_last_update_date  => :XXPNVRVOLHDRS.last_update_date );
end;here's my code in ON-LOCK trigger block level
begin
  select lease_id
        ,lease_name
        ,lease_number
        ,location_id
        ,location_code
        ,customer_id
        ,customer_name
        ,var_rent_id
        ,var_rent_number
        ,period_name
        ,comments
        ,period_set_name
        ,import_flag
        ,passthrough_flag
        ,created_by
        ,creation_date
        ,last_updated_by
        ,last_update_date
    into :XXPNVRVOLHDRS.lease_id
        ,:XXPNVRVOLHDRS.lease_name
        ,:XXPNVRVOLHDRS.lease_number
        ,:XXPNVRVOLHDRS.location_id
        ,:XXPNVRVOLHDRS.location_code
        ,:XXPNVRVOLHDRS.customer_id
        ,:XXPNVRVOLHDRS.customer_name
        ,:XXPNVRVOLHDRS.var_rent_id
        ,:XXPNVRVOLHDRS.var_rent_number
        ,:XXPNVRVOLHDRS.period_name
        ,:XXPNVRVOLHDRS.comments
        ,:XXPNVRVOLHDRS.period_set_name
        ,:XXPNVRVOLHDRS.import_flag
        ,:XXPNVRVOLHDRS.passthrough_flag
        ,:XXPNVRVOLHDRS.created_by
        ,:XXPNVRVOLHDRS.creation_date
        ,:XXPNVRVOLHDRS.last_updated_by
        ,:XXPNVRVOLHDRS.last_update_date
    from xxpn_vr_vol_headers_v
   where rowid = :XXPNVRVOLHDRS.ROW_ID
     for update of lease_id
                  ,lease_name
                  ,lease_number
                  ,location_id
                  ,location_code
                  ,customer_id
                  ,customer_name
                  ,var_rent_id
                  ,var_rent_number
                  ,period_name
                  ,comments
                  ,period_set_name
                  ,import_flag
                  ,passthrough_flag
                  ,created_by
                  ,creation_date
                  ,last_updated_by
                  ,last_update_date;
end;properties for the block
Query Data Source Type: Table
Query Data Source Name: XXPN_VR_VOL_HEADERS_V
DML Target Type: Table
DML Target Name: XXPN_VR_VOL_HEADERS_V
i'd appreciate any help.
thanks