public virtual IList ToList(IModel model, string fieldName, Queryset queryset)
{
string query = GenerateSelectQuery(model.ModelDbAlias + "." + fieldName, model, queryset);
IList<DbValue[]> dbValuesList = ExecuteQuery(query, queryset != null ? queryset.GetParamsList() : null);
ArrayList list = new ArrayList(dbValuesList.Count);
foreach (DbValue[] dbValues in dbValuesList)
list.Add(dbValues[0].Value);
return list;
}
protected string GenerateSelectQuery(string fieldsList, IModel model, Queryset queryset)
{
StringBuilder sb = new StringBuilder();
sb.Append("SELECT ");
sb.Append(fieldsList);
sb.Append(" FROM ");
sb.Append(model.ModelDbName + " as " + model.ModelDbAlias);
if (queryset != null && !queryset.IsEmpty)
{
sb.Append(queryset.GetJoins(this));
sb.Append(queryset.GetWhereClause(this));
sb.Append(queryset.GetOrderByClause());
sb.Append(ToSqlLimit(queryset.LimitOffset, queryset.LimitCount));
}
return sb.ToString();
}
public virtual long SelectCount(IModel model, Queryset queryset = null)
{
if (model != null)
{
string sCountSql = string.Format("SELECT COUNT(1) FROM {0} as {1}{2}{3}",
model.ModelDbName,
model.ModelDbAlias,
queryset != null ? queryset.GetJoins(this): "",
queryset != null ? queryset.GetWhereClause(this) : "");
object res = ExecuteScalar(sCountSql, queryset != null ? queryset.GetParamsList() : null);
long count;
if (res != null && Int64.TryParse(res.ToString(), out count))
return count;
}
return -1;
}
public virtual DataTable ToDataTable(IModel model, string[] fieldNames, Queryset queryset)
{
string query = "";
for (int i = 0; i < fieldNames.Length; i++)
{
if (i > 0)
query += ",";
query += model.ModelDbAlias + "." + fieldNames[i];
}
query = GenerateSelectQuery(query, model, queryset);
IList<DbValue[]> dbValuesList = ExecuteQuery(query, queryset != null ? queryset.GetParamsList() : null);
DataTable dt = new DataTable();
foreach (string fieldName in fieldNames)
dt.Columns.Add(new DataColumn(fieldName, typeof(object)));
foreach (DbValue[] dbValues in dbValuesList)
{
DataRow row = dt.NewRow();
foreach (DbValue dbValue in dbValues)
row[dbValue.Column] = dbValue.Value;
dt.Rows.Add(row);
}
return dt;
}
public virtual bool Delete(IModel model, Queryset queryset)
{
StringBuilder sb = new StringBuilder();
sb.Append("DELETE FROM ");
sb.Append(model.ModelDbName + " as " + model.ModelDbAlias);
if (queryset != null && !queryset.IsEmpty)
{
sb.Append(queryset.GetJoins(this));
sb.Append(queryset.GetWhereClause(this));
}
ExecuteNonQuery(sb.ToString(), queryset != null ? queryset.GetParamsList() : null);
return true;
}
public virtual IList<DbValue[]> Select(IModel model, Queryset queryset = null)
{
string query = GenerateSelectQuery(ToFieldNamesList(model), model, queryset);
return ExecuteQuery(query, queryset != null ? queryset.GetParamsList() : null);
}
public IList ToList(string fieldName, Queryset queryset = null)
{
if (queryset != null)
queryset.Compile();
return DbEngine.ToList(ModelInfo, fieldName, queryset);
}
public long Count(Queryset queryset = null)
{
if (queryset != null)
queryset.Compile();
return DbEngine.SelectCount(ModelInfo, queryset);
}
public ModelsPage Page(int pagenum, int pagesize, Queryset queryset = null)
{
if (pagesize > 0)
{
long modelsCount = Count(queryset);
if (queryset != null)
queryset = queryset.Clone();
else
queryset = new Queryset(this);
queryset.Limit((pagenum - 1) * pagesize, pagesize);
if (modelsCount > 0)
{
int pagesCount = (int)Math.Ceiling((long)modelsCount * 1.0 / pagesize);
return new ModelsPage((long)modelsCount > 0 ? Load(queryset) : null,
pagesCount,
pagenum,
pagesize);
}
}
return ModelsPage.Empty;
}
public DataTable ToDataTable(string[] fieldNames, Queryset queryset = null)
{
if (queryset != null)
queryset.Compile();
return DbEngine.ToDataTable(ModelInfo, fieldNames, queryset);
}
public Model Get(Queryset queryset)
{
IList<Model> list = All(queryset);
if (list != null && list.Count > 0)
return list[0];
return null;
}
public Model Get(object pk = null)
{
if (pk != null)
{
QExprGroup qeg = new AndExprGroup().Add(
new QExpr(ModelInfo.ModelPKName, Constants.QueryCompareOps.EXACT, pk)
);
IEnumerable<Model> models = new Queryset(this).Filter(qeg).All();
if (models != null && models.Count() == 1)
return models.Single();
return null;
}
else
{
return OrmManager.CreateNewModel(ModelInfo.ModelApp, ModelInfo.ModelType);
}
}
public bool Delete(Queryset queryset)
{
if (queryset != null)
queryset.Compile();
return DbEngine.Delete(ModelInfo, queryset);
}
protected Queryset(Queryset source)
{
Queryset.CopyTo(source, this);
}
protected IList<Model> Load(Queryset queryset = null)
{
if (queryset != null)
queryset.Compile();
IList<DbValue[]> rows = DbEngine.Select(ModelInfo, queryset);
if (rows != null && rows.Count > 0)
{
List<Model> models = new List<Model>();
foreach (DbValue[] row in rows)
{
Model model = OrmManager.CreateNewModel(ModelInfo.ModelApp, ModelInfo.ModelType);
if (model != null)
{
foreach (DbValue dbValue in row)
{
Field field = model.GetFieldByDbName(dbValue.Column);
if (field != null)
model[field.Name] = field.FromDbValue(dbValue.Value);
}
model.Status = ModelStatus.Loaded;
models.Add(model);
}
}
return models;
}
return null;
}
protected internal static void CopyTo(Queryset source, Queryset target)
{
target._manager = source._manager;
target._filterConditions = source._filterConditions;
target._excludeConditions = source._excludeConditions;
target._compiled = false;
target._joins = source._joins;
target.LimitOffset = source.LimitOffset;
target.LimitCount = source.LimitCount;
target.OrderByFields = source.OrderByFields;
}
public IList<Model> All(Queryset queryset = null)
{
return Load(queryset);
}
