/// <summary>
/// Inserts obejcts without reading them into the cache
/// only used for manytomany table entries
/// </summary>
/// <param name="stmt"></param>
/// <typeparam name="T"></typeparam>
public void InsertStatement <T>(InsertExpression <T> stmt)
{
var conn = _connection;
if (conn.State != ConnectionState.Open)
{
conn.Open();
}
using var cmd = conn.CreateCommand();
cmd.CommandText = stmt.AsSqlString();
cmd.Transaction = _transaction;
foreach (var(type, id, value) in stmt.GetParameters())
{
var param = cmd.CreateParameter();
param.Value = value ?? DBNull.Value;
param.DbType = type;
param.ParameterName = id;
cmd.Parameters.Add(param);
}
using var result = cmd.ExecuteReader();
}
/// <summary>
/// Executes the given InsertStatement and maps returned values back into entities
/// objects created like this are add into the cache as managed entities
/// </summary>
/// <param name="stmt"></param>
/// <typeparam name="TEntity"></typeparam>
/// <exception cref="Exception"></exception>
public void Insert <TEntity>(InsertExpression <TEntity> stmt)
{
var conn = _connection;
if (conn.State != ConnectionState.Open)
{
conn.Open();
}
using var cmd = conn.CreateCommand();
cmd.CommandText = stmt.AsSqlString();
cmd.Transaction = _transaction;
// set all prepared stmt placeholders
foreach (var(type, id, value) in stmt.GetParameters())
{
var param = cmd.CreateParameter();
param.Value = value ?? DBNull.Value;
param.DbType = type;
param.ParameterName = id;
cmd.Parameters.Add(param);
}
using var reader = new CachedDataReader(
_ctx.Cache,
stmt.Entity,
cmd.ExecuteReader(),
_ctx
);
//reader reads objects into Cache
var entries = reader
.ReadAllInto(stmt.InsertedObjects.Cast <object>())
.ToList();
//register lazyloaders on newly created objects
foreach (var cacheEntry in entries)
{
RegisterLazyLoader(cacheEntry.Object, cacheEntry.Entity, cacheEntry);
}
}