/// <summary>
/// Sets the value of an existing <see cref="AttributeValue"/> and saves it to the database or creates a new database record if one doesn't already exist.
/// </summary>
/// <param name="attributeGuid">The parent <see cref="Rock.Model.Attribute"/> unique identifier.</param>
/// <param name="entityId">The ID of the entity - if any - to which this <see cref="AttributeValue"/> belongs.</param>
/// <param name="value">The value to be set.</param>
/// <param name="previousValue">If a <see cref="AttributeValue"/> already exists in the database, it's current value will be returned, so you can set it back after the current tests complete.</param>
/// <param name="newAttributeValueGuid">If a <see cref="AttributeValue"/> doesn't already exist in the database, the <see cref="Guid"/> of the newly-created record will be returned, so you can delete it after the current tests complete.</param>
public static void SetAttributeValue(Guid attributeGuid, int?entityId, string value, out string previousValue, out Guid newAttributeValueGuid)
{
using (var rockContext = new RockContext())
{
previousValue = null;
newAttributeValueGuid = Guid.Empty;
var attributeId = AttributeCache.GetId(attributeGuid);
if (!attributeId.HasValue)
{
return;
}
var attributeValueService = new AttributeValueService(rockContext);
var attributeValue = attributeValueService.GetByAttributeIdAndEntityId(attributeId.Value, entityId);
if (attributeValue == null)
{
attributeValue = new AttributeValue
{
AttributeId = attributeId.Value,
EntityId = entityId,
Value = value
};
attributeValueService.Add(attributeValue);
// Remember this so we can delete this AttributeValue upon cleanup.
newAttributeValueGuid = attributeValue.Guid;
}
else
{
// Remeber this so we can set it back upon cleanup.
previousValue = attributeValue.Value;
attributeValue.Value = value;
}
rockContext.SaveChanges();
}
}