Download link for blob field on page

I have a form based on table with a blob column:
TEMPLATE blob
The 'Display as' on the item is set to 'File Browse...'
The Source Type is set to 'Database Column' and Source value or Expression is set to 'TEMPLATE'
I want the 'Download' link to appear next to the 'Browse' button, so I tried to change the Source value to
'TEMPLATE::::', but it gives me this when I try to save:
1 error has occurred
""."TEMPLATE" not found.
How canI get the 'Download' link to appear?

bobmagan,
Thanks for importing your app. Sorry for the late reply. Here's what I've found:
For some reason this download link seems to be tied to the TABLE NAME specified in an Automatic Row Processing process. I created an ARP to process the row instead of using the custom procedure that you wrote to process the record. I specified all the normal stuff in the ARP (i.e., TABLE_NAME, PRIMARY_KEY). After the process was created, I modified the TEMPLATE item source to TEMPLATE:::: w/o error and the download link appeared fine.
To further test, I then went back the ARP and changed the table name to lower case, edited the TEMPLATE item again, and got the following error:
*"report_layout"."TEMPLATE" not found.*
When you use DATABASE COLUMN as the source type for the item, it must be using the table_name in the ARP to identify the column being referenced.
This may a good question for the APEX developers. They could probably shed more light on this.
All in all, the workaround I found is to create the ARP and set it's condition to NEVER so that it never runs. You can still use your custom process to insert/update/delete the record. Then you can edit the item, add the TEMPLATE::::, and get the download link to appear. I left the solution up and running in your app for you to see.
Sorry for all the confusion, but I hope this helps you out.
Let me know what you think...
Keith Malay
www.sds-cg.com

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Re: Problem providing download link for BLOB data in apex report

Hi Don,
Your solution below worked but in the download option i only see save but not open for PDf file in the blob. Please let me know if you have any suggestion to achieve it
Thanks
Jo
Problem providing download link for BLOB data in apex report
591953 Nov 19, 2008 1:55 PM (in response to 660436)
Currently Being Moderated
Good morning,
Here is how I have solved this problem.
1. The select statement in the sql for the report should not include the BLOB column. I decided to select only 2 columns, the column that has the key and the column with the filename.
2. On the first column ( the primary key ) I put in the format statement that was simply DOWNLOAD:TABLENAME:BLOB_COLUMN:PRIMARY_KEY
This works. I believe that the Oracle error I was getting was because I was trying to apply this format statement to the actual BLOB column.
So, it appears that you can use any of the columns in the report to hold the DOWNLOAD format statement since in the format statement, you are defining the BLOB table, BLOB column and the primary key into that column.
Hope this helps,
Don.

Branched out from a years old thread.
user3003326 Don't post to old threads, please.

Problem providing download link for BLOB data in apex report

Hi,
I am trying to create a report on a table with BLOB data so that the report displays a "download" link for the BLOB data. I am trying to give users the ability to download files from a website.
I have been following the instructions in OBE "Defining and Viewing BLOB Data in Oracle Application Express 3.1".
In the report, for the BLOB column, I have specified values for the following fields in Report Attributes->Column Formatting->Number/Date Format->BLOB Download Format Mask:
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When I remove the BLOB Download Format Mask information for the BLOB column, then the data displays in the report, but without the "download" link for the BLOB data (which is expected):
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Edited by: user716599 on Sep 18, 2008 12:31 AM

Good morning,
Here is how I have solved this problem.
1. The select statement in the sql for the report should not include the BLOB column. I decided to select only 2 columns, the column that has the key and the column with the filename.
2. On the first column ( the primary key ) I put in the format statement that was simply DOWNLOAD:TABLENAME:BLOB_COLUMN:PRIMARY_KEY
This works. I believe that the Oracle error I was getting was because I was trying to apply this format statement to the actual BLOB column.
So, it appears that you can use any of the columns in the report to hold the DOWNLOAD format statement since in the format statement, you are defining the BLOB table, BLOB column and the primary key into that column.
Hope this helps,
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Download link for Blob content

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I am using file browse page item to upload a blob data. Here i am able to successfully add the blob data into table name. My question is how should i have a download_link under the file browse page item to download the bob data. I am using apex 4.0.
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"MIME Type Column"=MIMETYPE;
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apexlearner wrote:
Hi all,
I am using file browse page item to upload a blob data. Here i am able to successfully add the blob data into table name. My question is how should i have a download_link under the file browse page item to download the bob data. I am using apex 4.0.
Note: In file_browse page item i had set
"Storage Type"=Blob column specified in item source attribute;
"MIME Type Column"=MIMETYPE;
"Filename Column"=FILENAME;
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>
Should the download link be displayed next to the "Browse" button? The download link will only be visible if the BLOB column really contains content.
>
To get the link to appear under the item instead of alongside, add the following to the page HTML Header:
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#P6_PRODUCT_IMAGE+a {
display: block;
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