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- ZeroDbContext.LoadSchemasAndNavigates；

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2881099
2025-04-19 09:17:17 +08:00
parent 28d3a53c9b
commit d78e68523c
1 changed files with 35 additions and 1 deletions
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36
Extensions/FreeSql.Extensions.ZeroEntity/ZeroDbContext.cs
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@@ -273,7 +273,41 @@ ManyToMany 级联删除中间表（注意不删除外部根）
}
/// <summary>
/// 从数据库中加载<para></para>
/// 从自定义中加载（多表）<para></para>
/// - tableName 以及 Navigates 所依赖表 Schema
/// </summary>
public List<TableDescriptor> LoadSchemasAndNavigates(string tableName, Func<string, TableDescriptor> getSchemaHandler)
{
if (getSchemaHandler == null) throw new Exception($"{nameof(getSchemaHandler)} 不能为 null");
var schema = getSchemaHandler(tableName);
if (schema == null) throw new Exception($"{nameof(getSchemaHandler)}({tableName}) 返回值不能为 null");
var returnSchemas = new List<TableDescriptor>();
returnSchemas.Add(schema);
LocalEachNavigate(schema);
return returnSchemas;
void LocalEachNavigate(TableDescriptor desc)
{
if (desc.Navigates?.Any() != true) return;
foreach(var nav in desc.Navigates)
{
if (returnSchemas.Any(a => a.Name == nav.RelTable)) continue;
var navSchema = getSchemaHandler(nav.RelTable);
if (navSchema == null) throw new Exception($"{nameof(getSchemaHandler)}({nav.RelTable}) 返回值不能为 null");
returnSchemas.Add(navSchema);
LocalEachNavigate(navSchema);
if (nav.Type == TableDescriptor.NavigateType.ManyToMany && !string.IsNullOrWhiteSpace(nav.ManyToMany))
{
var midSchema = getSchemaHandler(nav.ManyToMany);
if (midSchema == null) throw new Exception($"{nameof(getSchemaHandler)}({nav.ManyToMany}) 返回值不能为 null");
returnSchemas.Add(midSchema);
}
}
}
}
/// <summary>
/// 从数据库中加载（单表）<para></para>
/// - 不支持 Navigates<para></para>
/// - 不支持 Indexes IndexMethod<para></para>
/// - 暂支持 SqlServer/MySql decimal(10,2)（其他数据库需实现对应 IDbFirst）