161 lines
5.8 KiB
C#
161 lines
5.8 KiB
C#
// (c) Copyright Ascensio System SIA 2010-2022
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//
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// This program is a free software product.
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// You can redistribute it and/or modify it under the terms
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// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
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// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
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// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
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// any third-party rights.
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//
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// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
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// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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//
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// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
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//
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// The interactive user interfaces in modified source and object code versions of the Program must
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// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
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//
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// Pursuant to Section 7(b) of the License you must retain the original Product logo when
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// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
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// trademark law for use of our trademarks.
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//
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
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// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
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// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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namespace ASC.Core.Common.EF;
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public class CustomMySqlMigrationsSqlGenerator : MySqlMigrationsSqlGenerator
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{
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public CustomMySqlMigrationsSqlGenerator(
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MigrationsSqlGeneratorDependencies dependencies,
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IRelationalAnnotationProvider migrationsAnnotations,
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#pragma warning disable EF1001 // Internal EF Core API usage.
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IMySqlOptions mySqlOptions)
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#pragma warning restore EF1001 // Internal EF Core API usage.
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: base(dependencies, migrationsAnnotations, mySqlOptions)
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{
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}
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public override IReadOnlyList<MigrationCommand> Generate(IReadOnlyList<MigrationOperation> operations, IModel model = null, MigrationsSqlGenerationOptions options = MigrationsSqlGenerationOptions.Default)
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{
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NotNull(operations, "operations");
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Options = options;
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var migrationCommandListBuilder = new CustomMigrationCommandListBuilder(Dependencies);
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try
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{
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foreach (var operation in operations)
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{
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Generate(operation, model, migrationCommandListBuilder);
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}
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}
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finally
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{
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Options = MigrationsSqlGenerationOptions.Default;
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}
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var test = migrationCommandListBuilder.GetCommandList();
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return migrationCommandListBuilder.GetCommandList();
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}
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private void NotNull(IReadOnlyList<MigrationOperation> value, string parameterName)
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{
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if (value is null)
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{
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throw new ArgumentNullException(parameterName);
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}
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}
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}
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public class CustomMigrationCommandListBuilder : MigrationCommandListBuilder
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{
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private string _operationContainer;
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private bool _isIndexOperation;
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public CustomMigrationCommandListBuilder(MigrationsSqlGeneratorDependencies dependencies)
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: base(dependencies) { }
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public override MigrationCommandListBuilder Append(string o)
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{
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if (o.StartsWith("INSERT INTO "))
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{
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o = o.Replace("INSERT INTO ", "INSERT IGNORE INTO ");
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}
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else if (o.StartsWith("CREATE TABLE "))
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{
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o = o.Replace("CREATE TABLE ", "CREATE TABLE IF NOT EXISTS ");
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}
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else if (o == "CREATE ")
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{
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_isIndexOperation = true;
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}
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if (_isIndexOperation == true)
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{
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_operationContainer += o;
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}
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else
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{
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base.Append(o);
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}
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return this;
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}
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public override MigrationCommandListBuilder AppendLine(string value)
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{
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if (_isIndexOperation == true)
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{
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AppendIndexOpeartion(_operationContainer);
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_operationContainer = "";
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_isIndexOperation = false;
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}
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return base.AppendLine(value);
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}
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private void AppendIndexOpeartion(string indexOperation)
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{
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const string startOpearation = "CREATE ";
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const string startUnique = "UNIQUE ";
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const string startIndexName = "INDEX `";
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const string startTableName = "` ON `";
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const string StartColumnsName = "` (`";
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const string endColumnsName = "`)";
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var separatingStrings = new[] { startOpearation, startUnique, startIndexName, startTableName, StartColumnsName, endColumnsName };
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var separatedOpearion = indexOperation.Split(separatingStrings, StringSplitOptions.RemoveEmptyEntries);
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var indexName = separatedOpearion[0];
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var tableName = separatedOpearion[1];
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var createIndexForMySQL =
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$"set @x := (select count(*) from information_schema.statistics where table_name = '{tableName}' and index_name = '{indexName}' and table_schema = database()); " +
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$"set @sql := if (@x > 0, 'select ''Index exists.''', '{indexOperation};'); " +
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$"PREPARE stmt FROM @sql; " +
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$"EXECUTE stmt";
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switch (Dependencies.CurrentContext.Context.Database.ProviderName)
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{
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case "Npgsql.EntityFrameworkCore.PostgreSQL":
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base.Append(createIndexForMySQL);
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break;
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case "Microsoft.EntityFrameworkCore.SqlServer":
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base.Append(createIndexForMySQL);
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break;
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case "Microsoft.EntityFrameworkCore.MySql":
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base.Append(createIndexForMySQL);
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break;
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default:
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base.Append(createIndexForMySQL);
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break;
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}
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}
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}
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