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- 增加 linq to sql 的查询语法，以及单元测试；

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This commit is contained in:
28810
2019-05-07 19:09:19 +08:00
parent 7a625be8c9
commit 59b1b7220d
13 changed files with 351 additions and 20 deletions
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39
FreeSql/Internal/CommonProvider/SelectProvider/Select0Provider.cs
View File

@ -31,6 +31,7 @@ namespace FreeSql.Internal.CommonProvider {
protected DbConnection _connection;
protected Action<object> _trackToList;
protected bool _distinct;
protected Expression _selectExpression;
internal static void CopyData(Select0Provider<TSelect, T1> from, object to, ReadOnlyCollection<ParameterExpression> lambParms) {
var toType = to?.GetType();
@ -43,19 +44,22 @@ namespace FreeSql.Internal.CommonProvider {
toType.GetField("_having", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, from._having);
toType.GetField("_where", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, new StringBuilder().Append(from._where.ToString()));
toType.GetField("_params", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, new List<DbParameter>(from._params.ToArray()));
//toType.GetField("_tables", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, new List<SelectTableInfo>(from._tables.ToArray()));
var _multiTables = toType.GetField("_tables", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(to) as List<SelectTableInfo>;
_multiTables[0] = from._tables[0];
for (var a = 1; a < lambParms.Count; a++) {
var tb = from._tables.Where(b => b.Alias == lambParms[a].Name && b.Table.Type == lambParms[a].Type).FirstOrDefault();
if (tb != null) _multiTables[a] = tb;
else {
_multiTables[a].Alias = lambParms[a].Name;
_multiTables[a].Parameter = lambParms[a];
if (lambParms == null)
toType.GetField("_tables", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, new List<SelectTableInfo>(from._tables.ToArray()));
else {
var _multiTables = toType.GetField("_tables", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(to) as List<SelectTableInfo>;
_multiTables[0] = from._tables[0];
for (var a = 1; a < lambParms.Count; a++) {
var tb = from._tables.Where(b => b.Alias == lambParms[a].Name && b.Table.Type == lambParms[a].Type).FirstOrDefault();
if (tb != null) _multiTables[a] = tb;
else {
_multiTables[a].Alias = lambParms[a].Name;
_multiTables[a].Parameter = lambParms[a];
}
}
if (_multiTables.Count < from._tables.Count)
_multiTables.AddRange(from._tables.GetRange(_multiTables.Count, from._tables.Count - _multiTables.Count));
}
if (_multiTables.Count < from._tables.Count)
_multiTables.AddRange(from._tables.GetRange(_multiTables.Count, from._tables.Count - _multiTables.Count));
toType.GetField("_tableRules", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, from._tableRules);
toType.GetField("_join", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, new StringBuilder().Append(from._join.ToString()));
toType.GetField("_cache", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, from._cache);
@ -66,6 +70,7 @@ namespace FreeSql.Internal.CommonProvider {
toType.GetField("_connection", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, from._connection);
toType.GetField("_trackToList", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, from._trackToList);
toType.GetField("_distinct", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, from._distinct);
toType.GetField("_selectExpression", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, from._selectExpression);
}
public Select0Provider(IFreeSql orm, CommonUtils commonUtils, CommonExpression commonExpression, object dywhere) {
@ -366,10 +371,14 @@ namespace FreeSql.Internal.CommonProvider {
return ret;
});
}
public List<T1> ToList(bool includeNestedMembers = false) =>
this.ToListPrivate(includeNestedMembers == false ? this.GetAllFieldExpressionTreeLevel2() : this.GetAllFieldExpressionTreeLevelAll());
public Task<List<T1>> ToListAsync(bool includeNestedMembers = false) =>
this.ToListPrivateAsync(includeNestedMembers == false ? this.GetAllFieldExpressionTreeLevel2() : this.GetAllFieldExpressionTreeLevelAll());
public List<T1> ToList(bool includeNestedMembers = false) {
if (_selectExpression != null) return this.InternalToList<T1>(_selectExpression);
return this.ToListPrivate(includeNestedMembers == false ? this.GetAllFieldExpressionTreeLevel2() : this.GetAllFieldExpressionTreeLevelAll());
}
public Task<List<T1>> ToListAsync(bool includeNestedMembers = false) {
if (_selectExpression != null) return this.InternalToListAsync<T1>(_selectExpression);
return this.ToListPrivateAsync(includeNestedMembers == false ? this.GetAllFieldExpressionTreeLevel2() : this.GetAllFieldExpressionTreeLevelAll());
}
public T1 ToOne() {
this.Limit(1);
return this.ToList().FirstOrDefault();

65
FreeSql/Internal/CommonProvider/SelectProvider/Select1Provider.cs
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@ -5,6 +5,7 @@ using System.Data;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
namespace FreeSql.Internal.CommonProvider {
@ -153,6 +154,70 @@ namespace FreeSql.Internal.CommonProvider {
return this.InternalToListAsync<TReturn>(select?.Body);
}
public ISelect<TReturn> Select<TReturn>(Expression<Func<T1, TReturn>> select) where TReturn : class {
if (typeof(TReturn) == typeof(T1)) return this as ISelect<TReturn>;
_tables[0].Parameter = select.Parameters[0];
_selectExpression = select.Body;
var ret = _orm.Select<TReturn>();
Select0Provider<ISelect<T1>, T1>.CopyData(this, ret, null);
return ret;
}
public ISelect<TResult> Join<TInner, TKey, TResult>(ISelect<TInner> inner, Expression<Func<T1, TKey>> outerKeySelector, Expression<Func<TInner, TKey>> innerKeySelector, Expression<Func<T1, TInner, TResult>> resultSelector) where TInner : class where TResult : class {
_tables[0].Parameter = resultSelector.Parameters[0];
_commonExpression.ExpressionLambdaToSql(outerKeySelector, new CommonExpression.ExpTSC { _tables = _tables });
this.InternalJoin(Expression.Lambda<Func<T1, TInner, bool>>(
Expression.Equal(outerKeySelector.Body, innerKeySelector.Body),
new[] { outerKeySelector.Parameters[0], innerKeySelector.Parameters[0] }
), SelectTableInfoType.InnerJoin);
if (typeof(TResult) == typeof(T1)) return this as ISelect<TResult>;
_selectExpression = resultSelector.Body;
var ret = _orm.Select<TResult>() as Select1Provider<TResult>;
Select0Provider<ISelect<T1>, T1>.CopyData(this, ret, null);
return ret;
}
public ISelect<TResult> GroupJoin<TInner, TKey, TResult>(ISelect<TInner> inner, Expression<Func<T1, TKey>> outerKeySelector, Expression<Func<TInner, TKey>> innerKeySelector, Expression<Func<T1, ISelect<TInner>, TResult>> resultSelector) where TInner : class where TResult : class {
_tables[0].Parameter = resultSelector.Parameters[0];
_commonExpression.ExpressionLambdaToSql(outerKeySelector, new CommonExpression.ExpTSC { _tables = _tables });
this.InternalJoin(Expression.Lambda<Func<T1, TInner, bool>>(
Expression.Equal(outerKeySelector.Body, innerKeySelector.Body),
new[] { outerKeySelector.Parameters[0], innerKeySelector.Parameters[0] }
), SelectTableInfoType.InnerJoin);
if (typeof(TResult) == typeof(T1)) return this as ISelect<TResult>;
_selectExpression = resultSelector.Body;
var ret = _orm.Select<TResult>() as Select1Provider<TResult>;
Select0Provider<ISelect<T1>, T1>.CopyData(this, ret, null);
return ret;
}
public ISelect<TResult> SelectMany<TCollection, TResult>(Expression<Func<T1, ISelect<TCollection>>> collectionSelector, Expression<Func<T1, TCollection, TResult>> resultSelector) where TCollection : class where TResult : class {
SelectTableInfo find = null;
if (collectionSelector.Body.NodeType == ExpressionType.Call) {
var callExp = collectionSelector.Body as MethodCallExpression;
if (callExp.Method.Name == "DefaultIfEmpty" && callExp.Object.Type.GenericTypeArguments.Any()) {
find = _tables.Where((a, idx) => idx > 0 && a.Type == SelectTableInfoType.InnerJoin && a.Table.Type == callExp.Object.Type.GenericTypeArguments[0]).LastOrDefault();
if (find != null) {
if (!string.IsNullOrEmpty(find.On)) find.On = Regex.Replace(find.On, $@"\b{find.Alias}\.", $"{resultSelector.Parameters[1].Name}.");
if (!string.IsNullOrEmpty(find.NavigateCondition)) find.NavigateCondition = Regex.Replace(find.NavigateCondition, $@"\b{find.Alias}\.", $"{resultSelector.Parameters[1].Name}.");
find.Type = SelectTableInfoType.LeftJoin;
find.Alias = resultSelector.Parameters[1].Name;
find.Parameter = resultSelector.Parameters[1];
}
}
}
if (find == null) {
var tb = _commonUtils.GetTableByEntity(typeof(TCollection));
if (tb == null) throw new Exception($"SelectMany 错误的类型：{typeof(TCollection).FullName}");
_tables.Add(new SelectTableInfo { Alias = resultSelector.Parameters[1].Name, AliasInit = resultSelector.Parameters[1].Name, Parameter = resultSelector.Parameters[1], Table = tb, Type = SelectTableInfoType.From });
}
if (typeof(TResult) == typeof(T1)) return this as ISelect<TResult>;
_selectExpression = resultSelector.Body;
var ret = _orm.Select<TResult>() as Select1Provider<TResult>;
Select0Provider<ISelect<T1>, T1>.CopyData(this, ret, null);
return ret;
}
public ISelect<T1> DefaultIfEmpty() {
return this;
}
public DataTable ToDataTable<TReturn>(Expression<Func<T1, TReturn>> select) {
if (select == null) return this.InternalToDataTable(select?.Body);
_tables[0].Parameter = select.Parameters[0];

1
FreeSql/Internal/CommonProvider/SelectProvider/SelectGroupingProvider.cs
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@ -110,6 +110,7 @@ namespace FreeSql.Internal.CommonProvider {
method = method.MakeGenericMethod(typeof(TReturn));
return method.Invoke(_select, new object[] { (map, field.Length > 0 ? field.Remove(0, 2).ToString() : null) }) as Task<List<TReturn>>;
}
public List<TReturn> Select<TReturn>(Expression<Func<ISelectGroupingAggregate<TKey, TValue>, TReturn>> select) => ToList(select);
public string ToSql<TReturn>(Expression<Func<ISelectGroupingAggregate<TKey, TValue>, TReturn>> select) {
var map = new ReadAnonymousTypeInfo();