Deliverables database table - Create
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''The creation of the [[Deliverables database table]].'' | ''The creation of the [[Deliverables database table]].'' | ||
| − | == | + | == Description == |
| − | + | The two constraints for the table can be implemented by by referencing<ref name="referencing>[http://www.sqlite.org/foreignkeys.html#fk_actions Foreign keys - SQLite definition]</ref> these columns to the appropriate columns.This is done as follows: | |
| − | + | * Delete contained deliverable when container is deleted: reference the <tt>ContainerId</tt> column to the <tt>Id</tt> of the [[Tasks database table|tasks table]]. | |
| − | + | * Delete cloned deliverable when parent deliverable is deleted: self-reference the <tt>ContainerId</tt> column to the <tt>Id</tt> column. | |
| − | + | ||
| − | The two constraints for the table can be implemented by by [http://www.sqlite.org/foreignkeys.html#fk_actions | + | |
| − | * Delete contained deliverable when container is deleted: reference the <tt>ContainerId</tt> column to the <tt>Id</tt> of the [[Tasks database table|tasks table]]. | + | |
| − | * Delete cloned deliverable when parent deliverable is deleted: self-reference the <tt>ContainerId | + | |
| − | + | ||
| − | + | ||
The last two constraints are implemented via [[Creating a cross reference|cross-referencing]] with the [[Connections database table|<tt>Connections</tt> table]]. Consequently, the <tt>ConnectionId</tt> field is added when this table is created. | The last two constraints are implemented via [[Creating a cross reference|cross-referencing]] with the [[Connections database table|<tt>Connections</tt> table]]. Consequently, the <tt>ConnectionId</tt> field is added when this table is created. | ||
| + | |||
| + | When a new project is created, the deliverables table is created. Because of the reference to the task (see [[#Constraints|"Constraints"]], the deliverables table must be created ''after'' the [[Tasks database table|tasks table]]. | ||
== SQL statement == | == SQL statement == | ||
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Name TEXT, | Name TEXT, | ||
Description TEXT, | Description TEXT, | ||
| − | |||
X INTEGER, | X INTEGER, | ||
Y INTEGER, | Y INTEGER, | ||
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ContainerId INTEGER REFERENCES Tasks(Id) ON DELETE CASCADE, | ContainerId INTEGER REFERENCES Tasks(Id) ON DELETE CASCADE, | ||
Link TEXT, | Link TEXT, | ||
| − | Available INTEGER | + | Available INTEGER |
) | ) | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| + | |||
| + | == References == | ||
| + | <references/> | ||
| + | |||
| + | ---- | ||
| + | * [[Deliverables database table]] | ||
| + | * [[Database]] | ||
