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@koistya
koistya committed Dec 15, 2011
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37 changes: 37 additions & 0 deletions .gitignore
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Thumbs.db
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References/
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27 changes: 27 additions & 0 deletions Data.sln
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Microsoft Visual Studio Solution File, Format Version 11.00
# Visual Studio 2010
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87 changes: 87 additions & 0 deletions EntityFramework.SchemaCompare/CheckCompatibilityWithModel.cs
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//-------------------------------------------------------------------------------
// <copyright file="CheckCompatibilityWithModel.cs" company="KriaSoft, LLC">
// Copyright (c) 2011 Konstantin Tarkus, KriaSoft LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// </copyright>
//-------------------------------------------------------------------------------

namespace System.Data.Entity
{
using System.Data.Entity.SchemaCompare.Infrastructure;
using System.Linq;
using System.Transactions;

/// <summary>
/// An implementation of <see cref="T:IDatabaseInitializer"/> that will compare
/// database schema with the entity model and throw an exception if critical
/// conflicts are found.
/// </summary>
/// <typeparam name="TContext">The type of the context.</typeparam>
public class CheckCompatibilityWithModel<TContext> : IDatabaseInitializer<TContext> where TContext : DbContext
{
/// <summary>
/// Initializes a new instance of the <see cref="T:System.Data.Entity.CheckCompatibilityWithModel`1"/> class.
/// </summary>
public CheckCompatibilityWithModel()
{
this.CreateDatabaseIfNotExists = true;
}

/// <summary>
/// Gets or sets a value indicating whether the database should be re-created
/// and optionally re-seeded if it does not exist. To seed the database,
/// create a derived class and override the Seed method. Default is True.
/// </summary>
public bool CreateDatabaseIfNotExists { get; set; }

/// <summary>
/// Executes the strategy to initialize the database for the given context.
/// </summary>
/// <param name="context">The context.</param>
public void InitializeDatabase(TContext context)
{
bool exists;

using (new TransactionScope(TransactionScopeOption.Suppress))
{
exists = context.Database.Exists();
}

if (exists)
{
var compatibilityIssues = context.Database.FindCompatibilityIssues();

if (compatibilityIssues.Any(x => x.IsCritical))
{
throw new DatabaseComparisonException(context, compatibilityIssues);
}
}
else if (this.CreateDatabaseIfNotExists)
{
context.Database.Create();
this.Seed(context);
context.SaveChanges();
}
}

/// <summary>
/// A that should be overridden to actually add data to the context for
/// seeding. The default implementation does nothing.
/// </summary>
/// <param name="context">The context to seed.</param>
protected virtual void Seed(TContext context)
{
}
}
}
61 changes: 61 additions & 0 deletions EntityFramework.SchemaCompare/ClassDiagram.cd
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63 changes: 63 additions & 0 deletions EntityFramework.SchemaCompare/DatabaseExtensions.cs
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//-------------------------------------------------------------------------------
// <copyright file="DatabaseExtensions.cs" company="KriaSoft, LLC">
// Copyright (c) 2011 Konstantin Tarkus, KriaSoft LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// </copyright>
//-------------------------------------------------------------------------------

namespace System.Data.Entity
{
using System.Collections.Generic;
using System.Data.Entity.SchemaCompare.Infrastructure;
using System.Data.Entity.SchemaCompare.Model;
using System.Data.Entity.SchemaCompare.Sql;
using System.Linq;

/// <summary>
/// Extension methods for <see cref="T:Database"/> class.
/// </summary>
public static class DatabaseExtensions
{
/// <summary>
/// Compares database with the model and returns a list of <see cref="T:CompatibilityIssue"/>.
/// </summary>
/// <param name="database">Database context.</param>
/// <returns>A list of compatibility issues.</returns>
public static IList<CompatibilityIssue> FindCompatibilityIssues(this Database database)
{
//// Reads database schema

List<Table> tables;

using (var db = new DatabaseContext(database.Connection))
{
db.ObjectContext.Connection.Open();

using (var cmd = db.Database.Connection.CreateCommand())
{
cmd.CommandText = new SqlQuery(db.Database.Connection.ServerVersion);

using (var reader = cmd.ExecuteReader())
{
tables = db.ObjectContext.Translate<Table>(reader).ToList();
}
}
}

//// TODO: Compare database schema with the model and return a list of compatibility issues.

return new List<CompatibilityIssue>();
}
}
}
94 changes: 94 additions & 0 deletions EntityFramework.SchemaCompare/EntityFramework.SchemaCompare.csproj
@@ -0,0 +1,94 @@
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<OutputType>Library</OutputType>
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