/// <summary>
/// Constructor
/// </summary>
/// <param name="isGeneric"></param>
/// <param name="type"></param>
/// <param name="columns"></param>
/// <param name="mapper"></param>
internal DataContractKey(bool isGeneric, Type type, string columns, SqlNamingMapper mapper)
{
IsGeneric = isGeneric;
foreach (var attr in type
#if !NETFRAMEWORK
.GetTypeInfo()
#endif
.GetCustomAttributes(false))
{
if (attr is DatabaseTableAttribute)
{
DatabaseTableSettings = (DatabaseTableAttribute)attr;
}
}
// TO DO: Should we really be calling the mapper in the data contract *key* constructor?
// (Whatever calls are made here are called *every time* we check whether we already have a contract.)
if (DatabaseTableSettings == null)
{
// we don't ever need to look up the mapper values if they have been overridden by the user-attribute;
// these will be from the user-mapper if defined, or the default mapper if not
DatabaseTableSettings = new DatabaseTableAttribute(
mapper.TableNameMapping(type),
mapper.CaseSensitiveColumns(type),
mapper.AutoMap(type));
}
HasMapperColumnsMapping =
mapper.ColumnNameMapping != SqlNamingMapper.IdentityColumnMapping ||
mapper.ColumnDataDirection != SqlNamingMapper.ColumnDataDirectionUnspecified ||
mapper.IgnoreColumn != SqlNamingMapper.NeverIgnoreColumn;
// If the user is trying to map column names in a dynamic instance of Mighty, then there must be a columns spec and columns auto-mapping must be left on
if (!IsGeneric && HasMapperColumnsMapping)
{
if (columns == null || columns == "*")
{
throw new InvalidOperationException($"You must provide an explicit `columns` specification to any dynamic instance of {nameof(MightyOrm)} with column name mapping");
}
if ((DatabaseTableSettings.AutoMap & AutoMap.Columns) == 0)
{
throw new InvalidOperationException($"You must enable {nameof(AutoMap)}.{nameof(AutoMap.Columns)} in your {nameof(DatabaseTableSettings.AutoMap)} settings for any dynamic instance of {nameof(MightyOrm)} with column name mapping");
}
// Columns is not needed in the data contract except if we're here;
// where needed, normalise it to improve caching
DynamicColumnSpec = NormaliseColumns(columns);
}
ColumnName = mapper.ColumnNameMapping;
ColumnDataDirection = mapper.ColumnDataDirection;
IgnoreColumn = mapper.IgnoreColumn;
DataItemType = type;
DynamicNullContract = !IsGeneric && DynamicColumnSpec == null;
}
#pragma warning restore IDE0059
/// <summary>
/// Is this the name of a PK field?
/// </summary>
/// <param name="fieldName">The name to check</param>
/// <param name="canonicalKeyName">Returns the canonical key name, i.e. as specified in <see cref="MightyOrm"/> constructor</param>
/// <returns></returns>
internal bool IsKey(string fieldName, out string canonicalKeyName)
{
canonicalKeyName = null;
foreach (var key in PrimaryKeyColumnList)
{
if (key.Equals(fieldName, SqlNamingMapper.CaseSensitiveColumns(DataItemType) ? StringComparison.Ordinal : StringComparison.OrdinalIgnoreCase))
{
canonicalKeyName = key;
return(true);
}
}
return(false);
}
