EOModelGroup

Inherits From:
NSObject

Conforms To: NSObject (NSObject)

Declared in: EOAccess/EOModelGroup.h

The default model group contains all models for an application, as well as any frameworks the application references. It is automatically created on demand. The entity name space among all of these models is global; consequently, the same entity name shouldn't appear in any two of the models. All cross-model information is represented in the models by entity name only. Binding the entity name to an actual entity is done at run-time within the EOModelGroup.

In the majority of applications, the automatic creation of the default model group is sufficient. However, your code can override this automatic creation; see "Setting Up A Model Group Programmatically."

• entity:classForObjectWithGlobalID:
• entity:failedToLookupClassNamed:
• entity:relationshipForRow:relationship:
• subEntityForEntity:primaryKey:isFinal:

Accessing the group

- addModel:

- addModelWithFile:

- modelNamed:

- modelNames

- models

- modelWithPath:

- removeModel:

Accessing model groups

+ defaultGroup

+ setDefaultGroup:

+ globalModelGroup

Searching a group

- entityNamed:

- entityForObject:

- fetchSpecificationNamed:entityNamed:

- storedProcedureNamed:

Loading all of a group's objects

- loadAllModelObjects

Assigning a delegate

+ classDelegate

- delegate

+ setClassDelegate:

- setDelegate:

classDelegate

Returns the EOModelGroup's class delegate. This delegate optionally implements the defaultModelGroup method (see the EOModelGroupClassDelegation protocol specification for more information).

See also: + setClassDelegate:

defaultGroup

Returns the default EOModelGroup. Unless you've either specified a default model group with setDefaultGroup: or implemented the defaultModelGroup class delegate method to return a non-nil value, this method is equivalent to globalModelGroup.

See also: + classDelegate

globalModelGroup

Returns an EOModelGroup composed of all models in the resource directory of the main bundle, as well as those in all the bundles and frameworks loaded into the application.

See also: + defaultGroup

setClassDelegate:

Assigns anObject as the EOModelGroup's class delegate. The class delegate is optional; it allows you to determine the default model group (see the EOModelGroupClassDelegation protocol specification for more information).

See also: + classDelegate, - defaultModelGroup

setDefaultGroup:

Sets the default model group to group. If you've implemented the defaultModelGroup class delegate method to return a non-nil value, the delegate's return value overrides group as the default model group.

See also: + defaultGroup,+ setClassDelegate:

addModel:

Adds a model to the receiver, sets the model's model group to the receiver, posts EOModelAddedNotification, then returns the newly-created EOModel. Raises if the receiver already contains an EOModel with the same name as the specified model.

See also: - models, - removeModel:

addModelWithFile:

Creates an EOModel object with the contents of the file identified by path, adds the newly-created model to the receiver, and returns it. Uses the EOModel method - initWithContentsOfFile: to initialize the new model, and adds it to the receiver with addModel:.

delegate

Returns the receiver's delegate, which is different from the EOModelGroup's class delegate. Each EOModelGroup object can have it's own delegate in addition to the delegate that's assigned to the EOModelGroup class. See the EOModelGroupDelegation protocol specification for more information.

See also: - setDelegate:, + classDelegate

entityForObject:

Returns the EOEntity associated with object from any of the models in the receiver that handle object, or nil if none of the entities in the receiver handles object.

See also: - entityForObject: (EOModel)

entityNamed:

Searches each of the EOModels in the receiver for the entity specified by entityName, and returns the entity if found. Returns nil if it is unable to find the specified entity.

See also: - entityNamed: (EOModel)

fetchSpecificationNamed:entityNamed:

Returns the named fetch specification from the entity specified by entityName in the receiving model group.

loadAllModelObjects

Sends loadAllModelObjects to each of the receiver's EOModels, thereby loading any EOEntities, EOAttributes, EORelationships, and EOStoredProcedures that haven't yet been loaded from each of the EOModels in the receiver.

See also: - loadAllModelObjects (EOModel)

modelNamed:

Returns the EOModel named modelName if it's part of the receiver, or nil if the receiver doesn't contain an EOModel with the specified name.

See also: - modelNames, - models

modelNames

Returns an array containing the names of all of the EOModels in the receiver, or an empty array if the receiver contains no EOModels. The order of the model names in the array isn't defined.

See also: - modelNamed:, - models

models

Returns an array containing the receiver's EOModels, or an empty array if the receiver contains no EOModels. The order of the models in the array isn't defined.

See also: - modelNamed:, - modelNames, - models

modelWithPath:

If the receiver contains an EOModel whose path (as determined by sending path to the EOModel object) is equal to path, that EOModel is returned. Otherwise, returns nil. NSString's isEqual: method is used to compare the paths, and each path is standardized (with stringByStandardizingPath) before comparison.

See also: - modelNamed::, - path (EOModel)

removeModel:

Removes aModel from the receiver, and unbinds any connections to aModel from other EOModels in the receiver. Posts EOModelInvalidatedNotification to the default notification center after removing aModel from the receiver.

setDelegate:

Sets the receiver's delegate to anObject. See the EOModelGroupDelegation protocol specification for more information.

See also: - delegate

storedProcedureNamed:

Returns the stored procedure in the receiving model group having the given name.

Notifications

EOModelAddedNotification

Notification Object	The newly added model.
Userinfo	None

EOModelInvalidatedNotification

Notification Object	The invalidated model.
Userinfo	None