OCLOperators PSEval
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Makes it possible use oclPS in any OCL expression. | Makes it possible use oclPS in any OCL expression. Using this you can "reach into" the database from OCL and action-language (EAL) | ||
Expression template | Expression template | ||
SomeClass.PSEval( | SomeClass.PSEval(<ps-expression>,maxfetch,offset,<dependon>) | ||
'''Note!''' - PSEval don't subscribe on sets from db. To make the operator auto-updating, provide an expression in "dependon" that when changed should also rerun the PSEval expression. This can for example be a timer. | '''Note!''' - PSEval don't subscribe on sets from db. To make the operator auto-updating, provide an expression in "dependon" that when changed should also rerun the PSEval expression. This can for example be a timer. | ||
Example | |||
Uppdrag.PSEval(self.Uppdrag->select(u|u.Aktivt)->orderDescending(u|u.Startdatum), 1000, 0, self.Uppdrag) | |||
For example this expression from a method having "userName" as a parameter | For example this expression from a method having "userName" as a parameter | ||
SysUser.PSEval(SysUser.allinstances->select(su|su.Username=userName),2,0,<nowiki>''</nowiki>) | SysUser.PSEval(SysUser.allinstances->select(su|su.Username=userName),2,0,<nowiki>''</nowiki>) | ||
Revision as of 15:26, 24 January 2023
Makes it possible use oclPS in any OCL expression. Using this you can "reach into" the database from OCL and action-language (EAL)
Expression template
SomeClass.PSEval(<ps-expression>,maxfetch,offset,<dependon>)
Note! - PSEval don't subscribe on sets from db. To make the operator auto-updating, provide an expression in "dependon" that when changed should also rerun the PSEval expression. This can for example be a timer.
Example
Uppdrag.PSEval(self.Uppdrag->select(u|u.Aktivt)->orderDescending(u|u.Startdatum), 1000, 0, self.Uppdrag)
For example this expression from a method having "userName" as a parameter
SysUser.PSEval(SysUser.allinstances->select(su|su.Username=userName),2,0,'')
Always remember that your SQL-server might also need indexes and other performance settings to be able to execute your expression efficient.
See also Sqlpassthrough , PSEvalValue
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