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Schema |
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Schema class object has a single instance in the DB3NF library and is a set of methods on top
of memory-based database that is created by SchemaLoad object when Web application starts.
This memory-based database is in essence an optimized for reads copy of the "Schema" Database.
Schema class does not access any databases directly.
| Schema |
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 | ClassRule(ParentClass, ChildClass) |
| ClassRulesSingleParents(ChildClass) |
| ClassSchema(Class) |
| CreatedStamps |
 | GetClassID(Class) |
| InstanceID |
| OptionValues(OptionID) |
| PropertyRule(Class, PropertyName) |
| PropertyRules(Class) |
| PropertySchema(PropertyName) |
| SetSession(SSSession) |
| UpdatedStamps |
| ValidateValue(Value, PropertyName, [Class], [ID]) |
Properties
| Name |
Data Type |
Parameters |
Comments |
| ClassRule |
ClassRules
(Read-only) |
ParentClass, ChildClass |
Returns tri-state relationship between classes.
crNotExists (0) - Not related
crMultipleParent (1) - Child class can have many parents of the parent class
crSingleParent (2) - Child class can have only one parent of the parent class
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| ClassRulesSingleParents |
Variant array |
ChildClass |
Returns all the Parents that can be only one for a child class for the specified class. |
| ClassSchema |
ClassSchema
(Read-only) |
Class |
Returns schema of a class. |
| CreatedStamps |
Boolean
(Read-only) |
NA |
Returns deployment setting for time stamps for creation. |
| InstanceID |
String |
NA |
DB3NF can support many (and any combination) of "Schema" and "Data" databases.
For default instance InstanceID can be ignored. For any other instance it has to be referenced by a name.
All the instances have to be listed in the global.asa
by the SchemaLoad. |
| OptionValues |
Variant array |
OptionID |
Returns an array of all the options.
Each element of the array is a two-element array itself as pair of option
value and option display name. |
| PropertyRule |
PropertyRule
(Read-only) |
Class, PropertyName |
Returns the rules for the specified property of the specified class. |
| PropertyRules |
RulesCollection
(Read-only) |
Class |
Returns collection of the rules for all the properties of the specified class. |
| PropertySchema |
PropertySchema
(Read-only) |
PropertyName |
Returns schema of a property. |
| UpdatedStamps |
Boolean
(Read-only) |
NA |
Returns deployment setting for time stamps for update. |
Methods
| Name |
Return Value |
Parameters |
Comments |
| GetClassID |
Long |
Class |
Returns ID of a class by its name. |
| SetSession (hidden) |
None |
SSSession |
Used to set session if Session Server is used. In case of IIS sessions this method is not needed. |
| ValidateValue |
String |
Value, PropertyName, [Class],[ID] |
Returns error message if property value is invalid.
If parent class and id are specified and property set in Schema as unique,
the method will check for uniquness of property as well. |
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