django-xformula

Django query evaluator, is built on top of XFormula language front-end.

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This project is still in development.

If you're interested, you may check the note in XFormula repository.

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Features:

• Bidirectional operators
• • Same syntax for both Python and Django query evaluation
• • Operations contain at least one QuerySet, will be evaluated as QuerySet
• • Operations contain at least one Q, will be evaluated as Q
• • Operations contain at least one Combinable, will be evaluated as Combinable
• • Operations contain at least one Field, will be evaluated as Combinable
• • Operations contain at least one Model instance, will be evaluated as Value which contains the model instance's primary key
• • Other operations work like how Python does
• Zero built-in variable by default
• • When a variable name is used but does not exist in the specified built-ins, it will be evaluated as F object
• Customizable attribute getter; manage which attributes can be used in formulas (Getting an attribute of an object is forbidden by default, and raises ForbiddenAttribute error which inherits Django's PermissionDenied class)
• Customizable caller; manage which functions can be called in formulas (Calling a callable is forbidden by default, and raises ForbiddenCall error which inherits Django's PermissionDenied class)

License

MIT