/// <summary>
/// 是否能设置值生成策略
/// </summary>
/// <param name="value">值生成策略</param>
/// <returns></returns>
protected virtual bool CanSetValueGenerationStrategy(OracleValueGenerationStrategy?value)
{
if (GetOracleValueGenerationStrategy(fallbackToModel: false) == value)
{
return(true);
}
if (!Annotations.CanSetAnnotation(OracleAnnotationNames.ValueGenerationStrategy, value))
{
return(false);
}
if (ShouldThrowOnConflict)
{
if (GetDefaultValue(fallback: false) != null)
{
throw new InvalidOperationException(RelationalStrings.ConflictingColumnServerGeneration(nameof(ValueGenerationStrategy), Property.Name, nameof(DefaultValue)));
}
if (GetDefaultValueSql(fallback: false) != null)
{
throw new InvalidOperationException(RelationalStrings.ConflictingColumnServerGeneration(nameof(ValueGenerationStrategy), Property.Name, nameof(DefaultValueSql)));
}
if (GetComputedColumnSql(fallback: false) != null)
{
throw new InvalidOperationException(RelationalStrings.ConflictingColumnServerGeneration(nameof(ValueGenerationStrategy), Property.Name, nameof(ComputedColumnSql)));
}
}
else if (value.HasValue && (!CanSetDefaultValue(null) || !CanSetDefaultValueSql(null) || !CanSetComputedColumnSql(null)))
{
return(false);
}
return(true);
}
protected virtual bool CanSetDefaultValue(object value)
{
if (!Annotations.CanSetAnnotation(
_fullAnnotationNames?.DefaultValue,
value))
{
return(false);
}
return(true);
}
protected virtual bool CanSetDefaultValue([CanBeNull] object value)
{
if (GetDefaultValue(false) == value)
{
return(true);
}
if (!Annotations.CanSetAnnotation(
RelationalFullAnnotationNames.Instance.DefaultValue,
ProviderFullAnnotationNames?.DefaultValue,
value))
{
return(false);
}
if (ShouldThrowOnConflict)
{
if (GetDefaultValueSql(false) != null)
{
throw new InvalidOperationException(
RelationalStrings.ConflictingColumnServerGeneration(nameof(DefaultValue), Property.Name, nameof(DefaultValueSql)));
}
if (GetComputedColumnSql(false) != null)
{
throw new InvalidOperationException(
RelationalStrings.ConflictingColumnServerGeneration(nameof(DefaultValue), Property.Name, nameof(ComputedColumnSql)));
}
}
else if (value != null &&
(!CanSetDefaultValueSql(null) ||
!CanSetComputedColumnSql(null)))
{
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 virtual bool CanSetName([CanBeNull] string value) => Annotations.CanSetAnnotation(RelationalAnnotationNames.Name, value);
