/// <summary>
/// Checks against the old database version to see which fields/properties have been updated and need to be written to the database
/// Note: Any dynamic objects are probably going to get updated every time. It's hard to compare them.
/// </summary>
/// <returns>UpdateOperation with the necessary updates</returns>
internal virtual UpdateOperation GetPendingUpdates()
{
var pendingUpdates = new UpdateOperation();
var type = this.GetType();
var writeableMemberNames = this.GetWriteableMembers();
List <MemberInfo> fieldsAndProperties =
// First collect all the fields and properties
type.GetFields().Cast <MemberInfo>()
.Concat(type.GetProperties().Cast <MemberInfo>())
// Only include those columns which are explicitly marked as writeable
.Where(member => writeableMemberNames.Contains(member.Name))
// Only include the ones which are serialized to JSON
.Where(member => member.CustomAttributes.Any(attr => attr.AttributeType.FullName == "Newtonsoft.Json.JsonPropertyAttribute"))
.ToList();
// Iterate over and process each automatically handled field/property
// to see if its value has been modified since the last time we read/wrote to the database
foreach (var memberInfo in fieldsAndProperties)
{
object oldValue;
object newValue;
if (memberInfo is FieldInfo)
{
var fieldInfo = (FieldInfo)memberInfo;
oldValue = fieldInfo.GetValue(this.DatabaseVersion);
newValue = fieldInfo.GetValue(this);
}
else
{
// We know that everything here is supposed to be either a FieldInfo or PropertyInfo,
// so if it's not FieldInfo, it should be a propertyInfo
var propertyInfo = (PropertyInfo)memberInfo;
if (this.DatabaseVersion == null)
{
oldValue = null;
}
else
{
oldValue = propertyInfo.GetValue(this.DatabaseVersion);
}
newValue = propertyInfo.GetValue(this);
}
// Record an update if the value has been modified
if (!AreObjectsEqual(oldValue, newValue))
{
string propertyName = GetMemberJsonName(memberInfo);
pendingUpdates.UpdateFieldWithObject(propertyName, newValue);
}
}
return(pendingUpdates);
}
public void UpdateOperation_UpdateFieldWithObject_String_SameAsUpdateFieldWithString(string inputValue)
{
var updateOp1 = new UpdateOperation();
updateOp1.UpdateFieldWithString("field", inputValue);
string json1 = updateOp1.ToJson();
var updateOp2 = new UpdateOperation();
updateOp2.UpdateFieldWithObject("field", inputValue);
string json2 = updateOp2.ToJson();
Assert.AreEqual(json1, json2);
}
public void UpdateOperation_UpdateFieldWithObject_Double_SameAsUpdateFieldWithNumber()
{
double value = 3.14;
var updateOp1 = new UpdateOperation();
updateOp1.UpdateFieldWithNumber("field", value);
string json1 = updateOp1.ToJson();
var updateOp2 = new UpdateOperation();
updateOp2.UpdateFieldWithObject("field", value);
string json2 = updateOp2.ToJson();
Assert.AreEqual(json1, json2);
}
