/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
public static bool CanHaveCheckConstraint(
IConventionEntityType entityType,
string name,
string?sql,
ConfigurationSource configurationSource)
{
var constraint = entityType.FindCheckConstraint(name);
if (constraint != null)
{
return(constraint.Sql == sql ||
configurationSource.Overrides(constraint.GetConfigurationSource()));
}
foreach (var derivedType in entityType.GetDerivedTypes())
{
var derivedCheckConstraint = (IConventionCheckConstraint?)CheckConstraint.FindDeclaredCheckConstraint(derivedType, name);
if (derivedCheckConstraint == null)
{
continue;
}
if (derivedCheckConstraint.Sql != sql &&
!configurationSource.Overrides(derivedCheckConstraint.GetConfigurationSource()))
{
return(false);
}
}
return(true);
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
public static IConventionCheckConstraint?HasCheckConstraint(
IConventionEntityType entityType,
string name,
string?sql,
ConfigurationSource configurationSource)
{
List <IConventionCheckConstraint>?checkConstraintsToBeDetached = null;
var constraint = entityType.FindCheckConstraint(name);
if (constraint != null)
{
if (constraint.Sql == sql)
{
((CheckConstraint)constraint).UpdateConfigurationSource(configurationSource);
return(constraint);
}
if (!configurationSource.Overrides(constraint.GetConfigurationSource()))
{
return(null);
}
entityType.RemoveCheckConstraint(name);
constraint = null;
}
else
{
foreach (var derivedType in entityType.GetDerivedTypes())
{
var derivedCheckConstraint =
(IConventionCheckConstraint?)CheckConstraint.FindDeclaredCheckConstraint(derivedType, name);
if (derivedCheckConstraint == null)
{
continue;
}
if (derivedCheckConstraint.Sql != sql &&
!configurationSource.Overrides(derivedCheckConstraint.GetConfigurationSource()))
{
return(null);
}
if (checkConstraintsToBeDetached == null)
{
checkConstraintsToBeDetached = new List <IConventionCheckConstraint>();
}
checkConstraintsToBeDetached.Add(derivedCheckConstraint);
}
}
List <IConventionCheckConstraint>?detachedCheckConstraints = null;
if (checkConstraintsToBeDetached != null)
{
detachedCheckConstraints = new List <IConventionCheckConstraint>();
foreach (var checkConstraintToBeDetached in checkConstraintsToBeDetached)
{
detachedCheckConstraints.Add(
checkConstraintToBeDetached.EntityType.RemoveCheckConstraint(checkConstraintToBeDetached.ModelName) !);
}
}
if (sql != null)
{
constraint = new CheckConstraint((IMutableEntityType)entityType, name, sql, configurationSource);
if (detachedCheckConstraints != null)
{
foreach (var detachedCheckConstraint in detachedCheckConstraints)
{
CheckConstraint.Attach(detachedCheckConstraint, constraint);
}
}
}
return(constraint);
}