New for WebDNA 5.x
- Appends a new record with the specified field values to the end of a database.
- SQL/ODBC Note: To append new records to the end of an ODBC-compliant table, use the [SQL] context.
- You can specifiy a WebDNA table, in place of a db file, in the Append context. For example: [Append table=TableName]values[/Append]
Optional Context Parameters
· autonumber - instructs WebDNA to automatically generate
the 'next highest number' value for the given fieldname.
To add new records to a database, put an Append context into a template (alternately,
you may use the Append command from a URL or
a FORM). Whenever WebDNA encounters an Append context, it immediately adds a
new record to the end of the specified database given the named field values
inside the Append context.
Example (normally you would put the following text into a .tpl file on your server and use a web browser to link to it):
- [Append db=SomeDatabase.db]name=Grant&address=1492 Somewhere Lane&zip=90000&date=[date][/Append]
The database "SomeDatabase.db" is opened, and a new record is added to the end. The field name "name" is set to "Grant," the field name "address" is set to "1492 Somewhere Lane," the field name "zip" is set to "90000," and the field name "date" is set to the current date. Notice that any WebDNA [xxx] tags inside the context are first substituted for their real values before being written to the database. The name of the database itself may also be an [xxx] tag, as in "[Append [FormVarable]]."
Any field names not existing in the database are ignored, and any fields you do not specify are left blank in the new record. Certain letters are illegal, such as <tab> or <carriage return>, so they are converted to <space> and <soft return> before being added to the database. Some computers use the two-character sequence <carriage return><line feed> to indicate a single end of line, which is automatically converted to a single <soft return> character before being added to the database.
You may specify an absolute or partial path to the database file, as in "/WebCatalog/Folder/SomeDatabase.db" or "../SomeDatabase.db" (relative paths start in the same folder as the template, just like URLs, so "../" will look "up" one folder level from the template, and "/" will start at the web server's root).
|Some database filenames are reserved. You may not create your own database named "WebCatalog Prefs," "Users.db," "ErrorMessages.db," "StandardConversions.db," or "Triggers.db"
- Note: Normally all database file paths are relative to the local
template, or if they begin with "/" they are relative to the web
server's virtual host root. You may optionally put "^" in front
of the file path to indicate the file can be found in a global root folder
called "Globals" inside the WebCatalogEngine folder. This global
root folder is the same regardless of the virtual host.
You can use the 'AUTONUMBER=' parameter with the [append]
or [replace] context to instruct WebDNA to automatically generate the 'next
highest number' value for the given fieldname. This is useful for 'ID' type
fields, where unique values are required.
Here is a demonstration of the AUTONUMBER feature using a WebDNA TABLE (of course
this will work on database files as well).
Example WebDNA code:
[ID] - [NAME] - [EMAIL]
1 - Scott - email@example.com
3 - OMNI - firstname.lastname@example.org
4 - Lee - email@example.com
You can see that WebDNA automatically generated the ID value by calculating
the 'next largest value', given the existing ID values in the table.
New for WebDNA 5.1
- You use the new [ThisAutonumber] tag from within an Append or Replace context, to retrieve the current auto-generated number (if the AUTONUMBER parameter was used).