/// <summary>
/// <para>
/// Returns the <see cref="MySqlValueGenerationStrategy" /> to use for the property.
/// </para>
/// <para>
/// If no strategy is set for the property, then the strategy to use will be taken from the <see cref="IModel" />.
/// </para>
/// </summary>
/// <returns> The strategy, or <see cref="MySqlValueGenerationStrategy.None"/> if none was set. </returns>
public static MySqlValueGenerationStrategy?GetValueGenerationStrategy([NotNull] this IReadOnlyProperty property, StoreObjectIdentifier storeObject = default)
{
var annotation = property[MySqlAnnotationNames.ValueGenerationStrategy];
if (annotation != null)
{
return((MySqlValueGenerationStrategy?)annotation);
}
if (property.GetDefaultValue() != null || property.GetDefaultValueSql() != null || property.GetComputedColumnSql() != null)
{
return(null);
}
if (storeObject != default &&
property.ValueGenerated == ValueGenerated.Never)
{
return(property.FindSharedStoreObjectRootProperty(storeObject)
?.GetValueGenerationStrategy(storeObject));
}
if (IsCompatibleIdentityColumn(property) && property.ValueGenerated == ValueGenerated.OnAdd)
{
return(MySqlValueGenerationStrategy.IdentityColumn);
}
if (IsCompatibleComputedColumn(property) && property.ValueGenerated == ValueGenerated.OnAddOrUpdate)
{
return(MySqlValueGenerationStrategy.ComputedColumn);
}
return(null);
}
static bool IsStrategyNoneNeeded(IReadOnlyProperty property, StoreObjectIdentifier storeObject)
{
if (property.ValueGenerated == ValueGenerated.OnAdd &&
property.GetDefaultValue(storeObject) == null &&
property.GetDefaultValueSql(storeObject) == null &&
property.GetComputedColumnSql(storeObject) == null &&
property.DeclaringEntityType.Model.GetValueGenerationStrategy() != NpgsqlValueGenerationStrategy.None)
{
var providerClrType = (property.GetValueConverter() ?? property.FindRelationalTypeMapping(storeObject)?.Converter)
?.ProviderClrType.UnwrapNullableType();
return(providerClrType != null && (providerClrType.IsInteger()));
}
return(false);
}
