public override void ElementPropertyChanged(ElementPropertyChangedEventArgs e)
{
base.ElementPropertyChanged(e);
Association element = (Association)e.ModelElement;
if (element.IsDeleted)
{
return;
}
Store store = element.Store;
Transaction current = store.TransactionManager.CurrentTransaction;
if (current.IsSerializing || ModelRoot.BatchUpdating)
{
return;
}
if (Equals(e.NewValue, e.OldValue))
{
return;
}
List <string> errorMessages = EFCoreValidator.GetErrors(element).ToList();
BidirectionalAssociation bidirectionalAssociation = element as BidirectionalAssociation;
switch (e.DomainProperty.Name)
{
case "FKPropertyName":
{
string fkPropertyName = e.NewValue?.ToString();
bool fkPropertyError = false;
// these can be multiples, separated by a comma
string[] priorForeignKeyPropertyNames = e.OldValue?.ToString().Split(',').Select(n => n.Trim()).ToArray() ?? new string[0];
IEnumerable <ModelAttribute> priorForeignKeyModelAttributes = string.IsNullOrEmpty(e.OldValue?.ToString())
? Array.Empty <ModelAttribute>()
: priorForeignKeyPropertyNames.Select(oldValue => element.Dependent.Attributes.FirstOrDefault(a => a.Name == oldValue))
.ToArray();
if (!string.IsNullOrEmpty(fkPropertyName))
{
string tag = $"({element.Source.Name}:{element.Target.Name})";
if (element.Dependent == null)
{
errorMessages.Add($"{tag} can't have foreign keys defined; no dependent role found");
break;
}
string[] foreignKeyPropertyNames = element.GetForeignKeyPropertyNames();
int propertyCount = foreignKeyPropertyNames.Length;
int identityCount = element.Principal.AllIdentityAttributes.Count();
if (propertyCount != identityCount)
{
errorMessages.Add($"{tag} foreign key must have zero or {identityCount} {(identityCount == 1 ? "property" : "properties")} defined, since "
+ $"{element.Principal.Name} has {identityCount} identity properties; found {propertyCount} instead");
fkPropertyError = true;
}
// validate names
foreach (string propertyName in foreignKeyPropertyNames)
{
if (!CodeGenerator.IsValidLanguageIndependentIdentifier(propertyName))
{
errorMessages.Add($"{tag} FK property name '{propertyName}' isn't a valid .NET identifier");
fkPropertyError = true;
}
if (element.Dependent.AllAttributes.Except(element.Dependent.Attributes).Any(a => a.Name == propertyName))
{
errorMessages.Add($"{tag} FK property name '{propertyName}' is used in a base class of {element.Dependent.Name}");
fkPropertyError = true;
}
}
if (!fkPropertyError)
{
// remove any flags and locks on the attributes that were foreign keys
foreach (ModelAttribute modelAttribute in priorForeignKeyModelAttributes)
{
modelAttribute.SetLocks(Locks.None);
modelAttribute.Summary = null;
modelAttribute.IsForeignKey = false;
modelAttribute.RedrawItem();
}
element.EnsureForeignKeyAttributes();
IEnumerable <ModelAttribute> currentForeignKeyModelAttributes = foreignKeyPropertyNames.Select(newValue => element.Dependent.Attributes.FirstOrDefault(a => a.Name == newValue));
// add delete flags and locks to the attributes that are now foreign keys
foreach (ModelAttribute modelAttribute in currentForeignKeyModelAttributes)
{
modelAttribute.SetLocks(Locks.None);
modelAttribute.Summary = $"Foreign key for {element.GetDisplayText()}";
modelAttribute.SetLocks(Locks.Delete);
modelAttribute.IsForeignKey = true;
modelAttribute.RedrawItem();
}
}
}
else
{
// foreign key was removed
// remove locks
foreach (ModelAttribute modelAttribute in priorForeignKeyModelAttributes)
{
modelAttribute.SetLocks(Locks.None);
modelAttribute.Summary = null;
modelAttribute.IsForeignKey = false;
}
}
}
break;
case "SourceCustomAttributes":
if (bidirectionalAssociation != null && !string.IsNullOrWhiteSpace(bidirectionalAssociation.SourceCustomAttributes))
{
bidirectionalAssociation.SourceCustomAttributes = $"[{bidirectionalAssociation.SourceCustomAttributes.Trim('[', ']')}]";
CheckSourceForDisplayText(bidirectionalAssociation);
}
break;
case "SourceDisplayText":
if (bidirectionalAssociation != null)
{
CheckSourceForDisplayText(bidirectionalAssociation);
}
break;
case "SourceMultiplicity":
Multiplicity sourceMultiplicity = (Multiplicity)e.NewValue;
// change unidirectional source cardinality
// if target is dependent
// source cardinality is 0..1 or 1
if (element.Target.IsDependentType && sourceMultiplicity == Multiplicity.ZeroMany)
{
errorMessages.Add($"Can't have a 0..* association from {element.Target.Name} to dependent type {element.Source.Name}");
break;
}
if ((sourceMultiplicity == Multiplicity.One && element.TargetMultiplicity == Multiplicity.One) ||
(sourceMultiplicity == Multiplicity.ZeroOne && element.TargetMultiplicity == Multiplicity.ZeroOne))
{
if (element.SourceRole != EndpointRole.NotSet)
{
element.SourceRole = EndpointRole.NotSet;
}
if (element.TargetRole != EndpointRole.NotSet)
{
element.TargetRole = EndpointRole.NotSet;
}
}
else
{
SetEndpointRoles(element);
}
// cascade delete behavior could now be illegal. Reset to default
element.SourceDeleteAction = DeleteAction.Default;
element.TargetDeleteAction = DeleteAction.Default;
break;
case "SourcePropertyName":
string sourcePropertyNameErrorMessage = ValidateAssociationIdentifier(element, element.Target, (string)e.NewValue);
if (EFModelDiagram.IsDropping && sourcePropertyNameErrorMessage != null)
{
element.Delete();
}
else
{
errorMessages.Add(sourcePropertyNameErrorMessage);
}
break;
case "SourceRole":
if (element.Source.IsDependentType)
{
element.SourceRole = EndpointRole.Dependent;
element.TargetRole = EndpointRole.Principal;
}
else if (!SetEndpointRoles(element))
{
if (element.SourceRole == EndpointRole.Dependent && element.TargetRole != EndpointRole.Principal)
{
element.TargetRole = EndpointRole.Principal;
}
else if (element.SourceRole == EndpointRole.Principal && element.TargetRole != EndpointRole.Dependent)
{
element.TargetRole = EndpointRole.Dependent;
}
}
break;
case "TargetCustomAttributes":
if (!string.IsNullOrWhiteSpace(element.TargetCustomAttributes))
{
element.TargetCustomAttributes = $"[{element.TargetCustomAttributes.Trim('[', ']')}]";
CheckTargetForDisplayText(element);
}
break;
case "TargetDisplayText":
CheckTargetForDisplayText(element);
break;
case "TargetMultiplicity":
Multiplicity newTargetMultiplicity = (Multiplicity)e.NewValue;
// change unidirectional target cardinality
// if target is dependent
// target cardinality must be 0..1 or 1
if (element.Target.IsDependentType && newTargetMultiplicity == Multiplicity.ZeroMany)
{
errorMessages.Add($"Can't have a 0..* association from {element.Source.Name} to dependent type {element.Target.Name}");
break;
}
if ((element.SourceMultiplicity == Multiplicity.One && newTargetMultiplicity == Multiplicity.One) ||
(element.SourceMultiplicity == Multiplicity.ZeroOne && newTargetMultiplicity == Multiplicity.ZeroOne))
{
if (element.SourceRole != EndpointRole.NotSet)
{
element.SourceRole = EndpointRole.NotSet;
}
if (element.TargetRole != EndpointRole.NotSet)
{
element.TargetRole = EndpointRole.NotSet;
}
}
else
{
SetEndpointRoles(element);
}
// cascade delete behavior could now be illegal. Reset to default
element.SourceDeleteAction = DeleteAction.Default;
element.TargetDeleteAction = DeleteAction.Default;
break;
case "TargetPropertyName":
// if we're creating an association via drag/drop, it's possible the existing property name
// is the same as the default property name. The default doesn't get created until the transaction is
// committed, so the drop's action will cause a name clash. Remove the clashing property, but
// only if drag/drop.
string targetPropertyNameErrorMessage = ValidateAssociationIdentifier(element, element.Source, (string)e.NewValue);
if (EFModelDiagram.IsDropping && targetPropertyNameErrorMessage != null)
{
element.Delete();
}
else
{
errorMessages.Add(targetPropertyNameErrorMessage);
}
break;
case "TargetRole":
if (element.Target.IsDependentType)
{
element.SourceRole = EndpointRole.Principal;
element.TargetRole = EndpointRole.Dependent;
}
else if (!SetEndpointRoles(element))
{
if (element.TargetRole == EndpointRole.Dependent && element.SourceRole != EndpointRole.Principal)
{
element.SourceRole = EndpointRole.Principal;
}
else if (element.TargetRole == EndpointRole.Principal && element.SourceRole != EndpointRole.Dependent)
{
element.SourceRole = EndpointRole.Dependent;
}
}
break;
}
errorMessages = errorMessages.Where(m => m != null).ToList();
if (errorMessages.Any())
{
current.Rollback();
ErrorDisplay.Show(string.Join("\n", errorMessages));
}
}
/// <inheritdoc />
public override void ElementPropertyChanged(ElementPropertyChangedEventArgs e)
{
base.ElementPropertyChanged(e);
Association element = (Association)e.ModelElement;
if (element.IsDeleted)
{
return;
}
Store store = element.Store;
ModelRoot modelRoot = store.ModelRoot();
Transaction current = store.TransactionManager.CurrentTransaction;
if (current.IsSerializing || ModelRoot.BatchUpdating)
{
return;
}
if (Equals(e.NewValue, e.OldValue))
{
return;
}
List <string> errorMessages = EFCoreValidator.GetErrors(element).ToList();
BidirectionalAssociation bidirectionalAssociation = element as BidirectionalAssociation;
using (Transaction inner = store.TransactionManager.BeginTransaction("Association ElementPropertyChanged"))
{
bool doForeignKeyFixup = false;
switch (e.DomainProperty.Name)
{
case "FKPropertyName":
{
if (store.ModelRoot().EntityFrameworkVersion == EFVersion.EF6 &&
element.SourceMultiplicity != Multiplicity.ZeroMany &&
element.TargetMultiplicity != Multiplicity.ZeroMany)
{
element.FKPropertyName = null;
doForeignKeyFixup = true;
}
else
{
ValidateForeignKeyNames(element, errorMessages);
}
if (!errorMessages.Any())
{
doForeignKeyFixup = true;
}
break;
}
case "SourceCustomAttributes":
{
if (bidirectionalAssociation != null && !string.IsNullOrWhiteSpace(bidirectionalAssociation.SourceCustomAttributes))
{
bidirectionalAssociation.SourceCustomAttributes = $"[{bidirectionalAssociation.SourceCustomAttributes.Trim('[', ']')}]";
CheckSourceForDisplayText(bidirectionalAssociation);
}
break;
}
case "SourceDisplayText":
{
if (bidirectionalAssociation != null)
{
CheckSourceForDisplayText(bidirectionalAssociation);
}
break;
}
case "SourceMultiplicity":
{
if (!ValidateMultiplicity(element, modelRoot, errorMessages, store, ref doForeignKeyFixup))
{
break;
}
Multiplicity priorSourceMultiplicity = (Multiplicity)e.OldValue;
if (((priorSourceMultiplicity == Multiplicity.ZeroOne || priorSourceMultiplicity == Multiplicity.ZeroMany) && element.SourceMultiplicity == Multiplicity.One) ||
((element.SourceMultiplicity == Multiplicity.ZeroOne || element.SourceMultiplicity == Multiplicity.ZeroMany) && priorSourceMultiplicity == Multiplicity.One))
{
doForeignKeyFixup = true;
}
string defaultSourcePropertyName =
priorSourceMultiplicity == Multiplicity.ZeroMany && ModelRoot.PluralizationService?.IsSingular(element.Source.Name) == true
? ModelRoot.PluralizationService.Pluralize(element.Source.Name)
: element.Source.Name;
if (element is BidirectionalAssociation bidirectional && bidirectional.SourcePropertyName == defaultSourcePropertyName)
{
bidirectional.SourcePropertyName = element.SourceMultiplicity == Multiplicity.ZeroMany && ModelRoot.PluralizationService?.IsSingular(element.Source.Name) == true
? ModelRoot.PluralizationService.Pluralize(element.Source.Name)
: element.Source.Name;
}
break;
}
case "SourcePropertyName":
{
string sourcePropertyNameErrorMessage = ValidateAssociationIdentifier(element, element.Target, (string)e.NewValue);
if (EFModelDiagram.IsDroppingExternal && sourcePropertyNameErrorMessage != null)
{
element.Delete();
}
else
{
errorMessages.Add(sourcePropertyNameErrorMessage);
}
break;
}
case "SourceRole":
{
if (element.SourceRole == EndpointRole.NotApplicable)
{
element.SourceRole = EndpointRole.NotSet;
}
//if (element.Source.IsDependentType)
//{
// element.SourceRole = EndpointRole.Dependent;
// element.TargetRole = EndpointRole.Principal;
//}
//else
if (!SetEndpointRoles(element))
{
if (element.SourceRole == EndpointRole.Dependent && element.TargetRole != EndpointRole.Principal)
{
element.TargetRole = EndpointRole.Principal;
}
else if (element.SourceRole == EndpointRole.Principal && element.TargetRole != EndpointRole.Dependent)
{
element.TargetRole = EndpointRole.Dependent;
}
}
doForeignKeyFixup = true;
break;
}
case "TargetCustomAttributes":
{
if (!string.IsNullOrWhiteSpace(element.TargetCustomAttributes))
{
element.TargetCustomAttributes = $"[{element.TargetCustomAttributes.Trim('[', ']')}]";
CheckTargetForDisplayText(element);
}
break;
}
case "TargetDisplayText":
{
CheckTargetForDisplayText(element);
break;
}
case "TargetMultiplicity":
{
if (!ValidateMultiplicity(element, modelRoot, errorMessages, store, ref doForeignKeyFixup))
{
break;
}
Multiplicity priorTargetMultiplicity = (Multiplicity)e.OldValue;
if (((priorTargetMultiplicity == Multiplicity.ZeroOne || priorTargetMultiplicity == Multiplicity.ZeroMany) && element.TargetMultiplicity == Multiplicity.One) ||
((element.TargetMultiplicity == Multiplicity.ZeroOne || element.TargetMultiplicity == Multiplicity.ZeroMany) && priorTargetMultiplicity == Multiplicity.One))
{
doForeignKeyFixup = true;
}
string defaultTargetPropertyName =
priorTargetMultiplicity == Multiplicity.ZeroMany && ModelRoot.PluralizationService?.IsSingular(element.Target.Name) == true
? ModelRoot.PluralizationService.Pluralize(element.Target.Name)
: element.Target.Name;
if (element.TargetPropertyName == defaultTargetPropertyName)
{
element.TargetPropertyName = element.TargetMultiplicity == Multiplicity.ZeroMany && ModelRoot.PluralizationService?.IsSingular(element.Target.Name) == true
? ModelRoot.PluralizationService.Pluralize(element.Target.Name)
: element.Target.Name;
}
break;
}
case "TargetPropertyName":
{
// if we're creating an association via drag/drop, it's possible the existing property name
// is the same as the default property name. The default doesn't get created until the transaction is
// committed, so the drop's action will cause a name clash. Remove the clashing property, but
// only if drag/drop.
string targetPropertyNameErrorMessage = ValidateAssociationIdentifier(element, element.Source, (string)e.NewValue);
if (EFModelDiagram.IsDroppingExternal && targetPropertyNameErrorMessage != null)
{
element.Delete();
}
else
{
errorMessages.Add(targetPropertyNameErrorMessage);
}
break;
}
case "TargetRole":
{
if (element.TargetRole == EndpointRole.NotApplicable)
{
element.TargetRole = EndpointRole.NotSet;
}
//if (element.Target.IsDependentType && (element.SourceRole != EndpointRole.Principal || element.TargetRole != EndpointRole.Dependent))
//{
// element.SourceRole = EndpointRole.Principal;
// element.TargetRole = EndpointRole.Dependent;
// doForeignKeyFixup = true;
//}
//else
if (!SetEndpointRoles(element))
{
if (element.TargetRole == EndpointRole.Dependent && element.SourceRole != EndpointRole.Principal)
{
element.SourceRole = EndpointRole.Principal;
doForeignKeyFixup = true;
}
else if (element.TargetRole == EndpointRole.Principal && element.SourceRole != EndpointRole.Dependent)
{
element.SourceRole = EndpointRole.Dependent;
doForeignKeyFixup = true;
}
}
break;
}
}
if (doForeignKeyFixup)
{
FixupForeignKeys(element);
}
inner.Commit();
element.RedrawItem();
}
errorMessages = errorMessages.Where(m => m != null).ToList();
if (errorMessages.Any())
{
current.Rollback();
ErrorDisplay.Show(store, string.Join("\n", errorMessages));
}
}
public override void ElementPropertyChanged(ElementPropertyChangedEventArgs e)
{
base.ElementPropertyChanged(e);
Association element = (Association)e.ModelElement;
if (element.IsDeleted)
{
return;
}
Store store = element.Store;
Transaction current = store.TransactionManager.CurrentTransaction;
if (current.IsSerializing)
{
return;
}
if (Equals(e.NewValue, e.OldValue))
{
return;
}
List <string> errorMessages = EFCoreValidator.GetErrors(element).ToList();
BidirectionalAssociation bidirectionalAssociation = element as BidirectionalAssociation;
switch (e.DomainProperty.Name)
{
case "SourceCustomAttributes":
if (bidirectionalAssociation != null && !string.IsNullOrWhiteSpace(bidirectionalAssociation.SourceCustomAttributes))
{
bidirectionalAssociation.SourceCustomAttributes = $"[{bidirectionalAssociation.SourceCustomAttributes.Trim('[', ']')}]";
CheckSourceForDisplayText(bidirectionalAssociation);
}
break;
case "SourceDisplayText":
if (bidirectionalAssociation != null)
{
CheckSourceForDisplayText(bidirectionalAssociation);
}
break;
case "SourceMultiplicity":
Multiplicity sourceMultiplicity = (Multiplicity)e.NewValue;
// change unidirectional source cardinality
// if target is dependent
// source cardinality is 0..1 or 1
if (element.Target.IsDependentType && sourceMultiplicity == Multiplicity.ZeroMany)
{
errorMessages.Add($"Can't have a 0..* association from {element.Target.Name} to dependent type {element.Source.Name}");
break;
}
if ((sourceMultiplicity == Multiplicity.One && element.TargetMultiplicity == Multiplicity.One) ||
(sourceMultiplicity == Multiplicity.ZeroOne && element.TargetMultiplicity == Multiplicity.ZeroOne))
{
if (element.SourceRole != EndpointRole.NotSet)
{
element.SourceRole = EndpointRole.NotSet;
}
if (element.TargetRole != EndpointRole.NotSet)
{
element.TargetRole = EndpointRole.NotSet;
}
}
else
{
SetEndpointRoles(element);
}
// cascade delete behavior could now be illegal. Reset to default
element.SourceDeleteAction = DeleteAction.Default;
element.TargetDeleteAction = DeleteAction.Default;
break;
case "SourcePropertyName":
string sourcePropertyNameErrorMessage = ValidateAssociationIdentifier(element, element.Target, (string)e.NewValue);
if (EFModelDiagram.IsDropping && sourcePropertyNameErrorMessage != null)
{
element.Delete();
}
else
{
errorMessages.Add(sourcePropertyNameErrorMessage);
}
break;
case "SourceRole":
if (element.Source.IsDependentType)
{
element.SourceRole = EndpointRole.Dependent;
element.TargetRole = EndpointRole.Principal;
}
else if (!SetEndpointRoles(element))
{
if (element.SourceRole == EndpointRole.Dependent && element.TargetRole != EndpointRole.Principal)
{
element.TargetRole = EndpointRole.Principal;
}
else if (element.SourceRole == EndpointRole.Principal && element.TargetRole != EndpointRole.Dependent)
{
element.TargetRole = EndpointRole.Dependent;
}
}
break;
case "TargetCustomAttributes":
if (!string.IsNullOrWhiteSpace(element.TargetCustomAttributes))
{
element.TargetCustomAttributes = $"[{element.TargetCustomAttributes.Trim('[', ']')}]";
CheckTargetForDisplayText(element);
}
break;
case "TargetDisplayText":
CheckTargetForDisplayText(element);
break;
case "TargetMultiplicity":
Multiplicity newTargetMultiplicity = (Multiplicity)e.NewValue;
// change unidirectional target cardinality
// if target is dependent
// target cardinality must be 0..1 or 1
if (element.Target.IsDependentType && newTargetMultiplicity == Multiplicity.ZeroMany)
{
errorMessages.Add($"Can't have a 0..* association from {element.Source.Name} to dependent type {element.Target.Name}");
break;
}
if ((element.SourceMultiplicity == Multiplicity.One && newTargetMultiplicity == Multiplicity.One) ||
(element.SourceMultiplicity == Multiplicity.ZeroOne && newTargetMultiplicity == Multiplicity.ZeroOne))
{
if (element.SourceRole != EndpointRole.NotSet)
{
element.SourceRole = EndpointRole.NotSet;
}
if (element.TargetRole != EndpointRole.NotSet)
{
element.TargetRole = EndpointRole.NotSet;
}
}
else
{
SetEndpointRoles(element);
}
// cascade delete behavior could now be illegal. Reset to default
element.SourceDeleteAction = DeleteAction.Default;
element.TargetDeleteAction = DeleteAction.Default;
break;
case "TargetPropertyName":
// if we're creating an association via drag/drop, it's possible the existing property name
// is the same as the default property name. The default doesn't get created until the transaction is
// committed, so the drop's action will cause a name clash. Remove the clashing property, but
// only if drag/drop.
string targetPropertyNameErrorMessage = ValidateAssociationIdentifier(element, element.Source, (string)e.NewValue);
if (EFModelDiagram.IsDropping && targetPropertyNameErrorMessage != null)
{
element.Delete();
}
else
{
errorMessages.Add(targetPropertyNameErrorMessage);
}
break;
case "TargetRole":
if (element.Target.IsDependentType)
{
element.SourceRole = EndpointRole.Principal;
element.TargetRole = EndpointRole.Dependent;
}
else if (!SetEndpointRoles(element))
{
if (element.TargetRole == EndpointRole.Dependent && element.SourceRole != EndpointRole.Principal)
{
element.SourceRole = EndpointRole.Principal;
}
else if (element.TargetRole == EndpointRole.Principal && element.SourceRole != EndpointRole.Dependent)
{
element.SourceRole = EndpointRole.Dependent;
}
}
break;
}
errorMessages = errorMessages.Where(m => m != null).ToList();
if (errorMessages.Any())
{
current.Rollback();
ErrorDisplay.Show(string.Join("\n", errorMessages));
}
}
public override void ElementPropertyChanged(ElementPropertyChangedEventArgs e)
{
base.ElementPropertyChanged(e);
Association element = (Association)e.ModelElement;
Store store = element.Store;
Transaction current = store.TransactionManager.CurrentTransaction;
if (current.IsSerializing)
{
return;
}
if (Equals(e.NewValue, e.OldValue))
{
return;
}
List <string> errorMessages = EFCoreValidator.GetErrors(element).ToList();
switch (e.DomainProperty.Name)
{
case "Persistent":
UpdateDisplayForPersistence(element);
break;
case "SourceDeleteAction":
DeleteAction sourceDeleteAction = (DeleteAction)e.NewValue;
UpdateDisplayForCascadeDelete(element, sourceDeleteAction);
break;
case "SourceMultiplicity":
Multiplicity newSourceMultiplicity = (Multiplicity)e.NewValue;
if (element.Target.IsDependentType && !element.Source.IsDependentType && newSourceMultiplicity == Multiplicity.ZeroMany)
{
errorMessages.Add($"Can't have a 0..* association from {element.Source.Name} to dependent type {element.Target.Name}");
break;
}
if ((newSourceMultiplicity == Multiplicity.One && element.TargetMultiplicity == Multiplicity.One) ||
(newSourceMultiplicity == Multiplicity.ZeroOne && element.TargetMultiplicity == Multiplicity.ZeroOne))
{
element.SourceRole = EndpointRole.NotSet;
element.TargetRole = EndpointRole.NotSet;
}
else
{
SetEndpointRoles(element);
}
UpdateDisplayForCascadeDelete(element, null, null, newSourceMultiplicity);
break;
case "SourcePropertyName":
string sourcePropertyNameErrorMessage = ValidateAssociationIdentifier(element, element.Target, (string)e.NewValue);
if (EFModelDiagram.IsDropping && sourcePropertyNameErrorMessage != null)
{
element.Delete();
}
else
{
errorMessages.Add(sourcePropertyNameErrorMessage);
}
break;
case "SourceRole":
EndpointRole newSourceRole = (EndpointRole)e.NewValue;
if (element.TargetRole == EndpointRole.NotSet && newSourceRole == EndpointRole.Dependent)
{
element.TargetRole = EndpointRole.Principal;
}
else if (element.TargetRole == EndpointRole.NotSet && newSourceRole == EndpointRole.Principal)
{
element.TargetRole = EndpointRole.Dependent;
}
break;
case "TargetDeleteAction":
DeleteAction targetDeleteAction = (DeleteAction)e.NewValue;
UpdateDisplayForCascadeDelete(element, null, targetDeleteAction);
break;
case "TargetMultiplicity":
Multiplicity newTargetMultiplicity = (Multiplicity)e.NewValue;
if (element.Source.IsDependentType && !element.Target.IsDependentType && newTargetMultiplicity == Multiplicity.ZeroMany)
{
errorMessages.Add($"Can't have a 0..* association from {element.Target.Name} to dependent type {element.Source.Name}");
break;
}
if ((element.SourceMultiplicity == Multiplicity.One && newTargetMultiplicity == Multiplicity.One) ||
(element.SourceMultiplicity == Multiplicity.ZeroOne && newTargetMultiplicity == Multiplicity.ZeroOne))
{
element.SourceRole = EndpointRole.NotSet;
element.TargetRole = EndpointRole.NotSet;
}
else
{
SetEndpointRoles(element);
}
UpdateDisplayForCascadeDelete(element, null, null, null, newTargetMultiplicity);
break;
case "TargetPropertyName":
// if we're creating an association via drag/drop, it's possible the existing property name
// is the same as the default property name. The default doesn't get created until the transaction is
// committed, so the drop's action will cause a name clash. Remove the clashing property, but
// only if drag/drop.
string targetPropertyNameErrorMessage = ValidateAssociationIdentifier(element, element.Source, (string)e.NewValue);
if (EFModelDiagram.IsDropping && targetPropertyNameErrorMessage != null)
{
element.Delete();
}
else
{
errorMessages.Add(targetPropertyNameErrorMessage);
}
break;
case "TargetRole":
EndpointRole newTargetRole = (EndpointRole)e.NewValue;
if (element.SourceRole == EndpointRole.NotSet && newTargetRole == EndpointRole.Dependent)
{
element.SourceRole = EndpointRole.Principal;
}
else if (element.SourceRole == EndpointRole.NotSet && newTargetRole == EndpointRole.Principal)
{
element.SourceRole = EndpointRole.Dependent;
}
break;
}
errorMessages = errorMessages.Where(m => m != null).ToList();
if (errorMessages.Any())
{
current.Rollback();
ErrorDisplay.Show(string.Join("; ", errorMessages));
}
}
