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Improved fix for #24: Multiple levels of complex properties (distinct source branch) #82

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Improved fix for #24: Multiple levels of complex properties (distinct source branch) #82

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45960f1
Fix for #24: Allow batch updates for ComplexType property
May 26, 2013
20cb4fa
#24 add missing project file changes
May 26, 2013
3be94e7
#24: Allow ComplexType properties in batch update
May 26, 2013
e296d42
Merge branch 'master' of https://github.com/steven-r/EntityFramework.…
May 26, 2013
634f393
Update ReflectionMappingProvider.cs
Jun 19, 2013
33b2a5d
Merge pull request #1 from michael-elschner/#24-nested-complex-proper…
Jun 19, 2013
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226 changes: 127 additions & 99 deletions Source/EntityFramework.Extended/Batch/SqlServerBatchRunner.cs
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Original file line number Diff line number Diff line change
@@ -1,8 +1,10 @@
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Data.EntityClient;
using System.Data.Objects;
using System.Diagnostics;
using System.Linq;
using System.Linq.Dynamic;
using System.Linq.Expressions;
Expand Down Expand Up @@ -170,112 +172,28 @@ public int Update<TEntity>(ObjectContext objectContext, EntityMap entityMap, Obj
bool wroteSet = false;
foreach (MemberBinding binding in memberInitExpression.Bindings)
{
if (wroteSet)
sqlBuilder.AppendLine(", ");

string propertyName = binding.Member.Name;
string columnName = entityMap.PropertyMaps
.Where(p => p.PropertyName == propertyName)
.Select(p => p.ColumnName)
.FirstOrDefault();


var memberAssignment = binding as MemberAssignment;
if (memberAssignment == null)
throw new ArgumentException("The update expression MemberBinding must only by type MemberAssignment.", "updateExpression");

Expression memberExpression = memberAssignment.Expression;

ParameterExpression parameterExpression = null;
memberExpression.Visit((ParameterExpression p) =>
{
if (p.Type == entityMap.EntityType)
parameterExpression = p;

return p;
});


if (parameterExpression == null)
IPropertyMapElement propertyMap =
entityMap.PropertyMaps.SingleOrDefault(p => p.PropertyName == binding.Member.Name);
if (propertyMap is ComplexPropertyMap)
{
object value;

if (memberExpression.NodeType == ExpressionType.Constant)
{
var constantExpression = memberExpression as ConstantExpression;
if (constantExpression == null)
throw new ArgumentException(
"The MemberAssignment expression is not a ConstantExpression.", "updateExpression");

value = constantExpression.Value;
}
else
{
LambdaExpression lambda = Expression.Lambda(memberExpression, null);
value = lambda.Compile().DynamicInvoke();
}

if (value != null)
{
string parameterName = "p__update__" + nameCount++;
var parameter = updateCommand.CreateParameter();
parameter.ParameterName = parameterName;
parameter.Value = value;
updateCommand.Parameters.Add(parameter);

sqlBuilder.AppendFormat("[{0}] = @{1}", columnName, parameterName);
}
else
ComplexPropertyMap cpm = propertyMap as ComplexPropertyMap;
var memberAssignment = binding as MemberAssignment;
if (memberAssignment == null)
throw new ArgumentException("The update expression MemberBinding must only by type MemberAssignment.", "updateExpression");
var expr = memberAssignment.Expression as MemberInitExpression;
if (expr == null)
throw new ArgumentException("The update expression MemberBinding must only by type MemberAssignment.", "updateExpression");
foreach (var subBinding in expr.Bindings)
{
sqlBuilder.AppendFormat("[{0}] = NULL", columnName);
AddUpdateRow<TEntity>(objectContext, entityMap, subBinding, sqlBuilder, updateCommand,
cpm.TypeElements, ref nameCount, ref wroteSet);
}
}
else
{
// create clean objectset to build query from
var objectSet = objectContext.CreateObjectSet<TEntity>();

Type[] typeArguments = new[] { entityMap.EntityType, memberExpression.Type };

ConstantExpression constantExpression = Expression.Constant(objectSet);
LambdaExpression lambdaExpression = Expression.Lambda(memberExpression, parameterExpression);

MethodCallExpression selectExpression = Expression.Call(
typeof(Queryable),
"Select",
typeArguments,
constantExpression,
lambdaExpression);

// create query from expression
var selectQuery = objectSet.CreateQuery(selectExpression, entityMap.EntityType);
string sql = selectQuery.ToTraceString();

// parse select part of sql to use as update
string regex = @"SELECT\s*\r\n(?<ColumnValue>.+)?\s*AS\s*(?<ColumnAlias>\[\w+\])\r\nFROM\s*(?<TableName>\[\w+\]\.\[\w+\]|\[\w+\])\s*AS\s*(?<TableAlias>\[\w+\])";
Match match = Regex.Match(sql, regex);
if (!match.Success)
throw new ArgumentException("The MemberAssignment expression could not be processed.", "updateExpression");

string value = match.Groups["ColumnValue"].Value;
string alias = match.Groups["TableAlias"].Value;

value = value.Replace(alias + ".", "");

foreach (ObjectParameter objectParameter in selectQuery.Parameters)
{
string parameterName = "p__update__" + nameCount++;

var parameter = updateCommand.CreateParameter();
parameter.ParameterName = parameterName;
parameter.Value = objectParameter.Value;
updateCommand.Parameters.Add(parameter);

value = value.Replace(objectParameter.Name, parameterName);
}
sqlBuilder.AppendFormat("[{0}] = {1}", columnName, value);
AddUpdateRow<TEntity>(objectContext, entityMap, binding, sqlBuilder, updateCommand,
entityMap.PropertyMaps, ref nameCount, ref wroteSet);
}
wroteSet = true;
}

sqlBuilder.AppendLine(" ");
Expand Down Expand Up @@ -316,6 +234,116 @@ public int Update<TEntity>(ObjectContext objectContext, EntityMap entityMap, Obj
}
}


private static void AddUpdateRow<TEntity>(ObjectContext objectContext, EntityMap entityMap, MemberBinding binding, StringBuilder sqlBuilder, DbCommand updateCommand, IEnumerable<IPropertyMapElement> propertyMap, ref int nameCount, ref bool wroteSet)
where TEntity : class
{
if (wroteSet)
sqlBuilder.AppendLine(", ");

string propertyName = binding.Member.Name;
PropertyMap property =
propertyMap.SingleOrDefault(p => p.PropertyName == propertyName) as PropertyMap;
Debug.Assert(property != null, "property != null");
string columnName = property.ColumnName;
var memberAssignment = binding as MemberAssignment;
if (memberAssignment == null)
throw new ArgumentException("The update expression MemberBinding must only by type MemberAssignment.", "binding");

Expression memberExpression = memberAssignment.Expression;

ParameterExpression parameterExpression = null;
memberExpression.Visit((ParameterExpression p) =>
{
if (p.Type == entityMap.EntityType)
parameterExpression = p;

return p;
});


if (parameterExpression == null)
{
object value;

if (memberExpression.NodeType == ExpressionType.Constant)
{
var constantExpression = memberExpression as ConstantExpression;
if (constantExpression == null)
throw new ArgumentException(
"The MemberAssignment expression is not a ConstantExpression.", "binding");

value = constantExpression.Value;
}
else
{
LambdaExpression lambda = Expression.Lambda(memberExpression, null);
value = lambda.Compile().DynamicInvoke();
}

if (value != null)
{
string parameterName = "p__update__" + nameCount++;
var parameter = updateCommand.CreateParameter();
parameter.ParameterName = parameterName;
parameter.Value = value;
updateCommand.Parameters.Add(parameter);

sqlBuilder.AppendFormat("[{0}] = @{1}", columnName, parameterName);
}
else
{
sqlBuilder.AppendFormat("[{0}] = NULL", columnName);
}
}
else
{
// create clean objectset to build query from
var objectSet = objectContext.CreateObjectSet<TEntity>();

Type[] typeArguments = new[] { entityMap.EntityType, memberExpression.Type };

ConstantExpression constantExpression = Expression.Constant(objectSet);
LambdaExpression lambdaExpression = Expression.Lambda(memberExpression, parameterExpression);

MethodCallExpression selectExpression = Expression.Call(
typeof(Queryable),
"Select",
typeArguments,
constantExpression,
lambdaExpression);

// create query from expression
var selectQuery = objectSet.CreateQuery(selectExpression, entityMap.EntityType);
string sql = selectQuery.ToTraceString();

// parse select part of sql to use as update
const string regex = @"SELECT\s*\r\n(?<ColumnValue>.+)?\s*AS\s*(?<ColumnAlias>\[\w+\])\r\nFROM\s*(?<TableName>\[\w+\]\.\[\w+\]|\[\w+\])\s*AS\s*(?<TableAlias>\[\w+\])";
Match match = Regex.Match(sql, regex);
if (!match.Success)
throw new ArgumentException("The MemberAssignment expression could not be processed.", "binding");

string value = match.Groups["ColumnValue"].Value;
string alias = match.Groups["TableAlias"].Value;

value = value.Replace(alias + ".", "");

foreach (ObjectParameter objectParameter in selectQuery.Parameters)
{
string parameterName = "p__update__" + nameCount++;

var parameter = updateCommand.CreateParameter();
parameter.ParameterName = parameterName;
parameter.Value = objectParameter.Value;
updateCommand.Parameters.Add(parameter);

value = value.Replace(objectParameter.Name, parameterName);
}
sqlBuilder.AppendFormat("[{0}] = {1}", columnName, value);
}
wroteSet = true;
}

private static Tuple<DbConnection, DbTransaction> GetStore(ObjectContext objectContext)
{
DbConnection dbConnection = objectContext.Connection;
Expand Down
2 changes: 2 additions & 0 deletions Source/EntityFramework.Extended/EntityFramework.Extended.csproj
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Original file line number Diff line number Diff line change
Expand Up @@ -100,10 +100,12 @@
<Compile Include="Extensions\BatchExtensions.cs" />
<Compile Include="Extensions\ObjectContextExtensions.cs" />
<Compile Include="IContainer.cs" />
<Compile Include="Mapping\ComplexPropertyMap.cs" />
<Compile Include="Mapping\EntityMap.cs" />
<Compile Include="Extensions\ExpressionExtensions.cs" />
<Compile Include="Extensions\ObjectQueryExtensions.cs" />
<Compile Include="Mapping\IMappingProvider.cs" />
<Compile Include="Mapping\IPropertyMapElement.cs" />
<Compile Include="Mapping\ReflectionMappingProvider.cs" />
<Compile Include="Mapping\MappingResolver.cs" />
<Compile Include="Mapping\PropertyMap.cs" />
Expand Down
2 changes: 2 additions & 0 deletions Source/EntityFramework.Extended/EntityFramework.Extended.net40.csproj
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Original file line number Diff line number Diff line change
Expand Up @@ -100,10 +100,12 @@
<Compile Include="Extensions\BatchExtensions.cs" />
<Compile Include="Extensions\ObjectContextExtensions.cs" />
<Compile Include="IContainer.cs" />
<Compile Include="Mapping\ComplexPropertyMap.cs" />
<Compile Include="Mapping\EntityMap.cs" />
<Compile Include="Extensions\ExpressionExtensions.cs" />
<Compile Include="Extensions\ObjectQueryExtensions.cs" />
<Compile Include="Mapping\IMappingProvider.cs" />
<Compile Include="Mapping\IPropertyMapElement.cs" />
<Compile Include="Mapping\ReflectionMappingProvider.cs" />
<Compile Include="Mapping\MappingResolver.cs" />
<Compile Include="Mapping\PropertyMap.cs" />
Expand Down
22 changes: 22 additions & 0 deletions Source/EntityFramework.Extended/Mapping/ComplexPropertyMap.cs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,22 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace EntityFramework.Mapping
{
/// <summary>
/// A property map element representing a complex class
/// </summary>
public class ComplexPropertyMap: IPropertyMapElement
{

public string PropertyName { get; set; }

/// <summary>
/// The enumeration of the complex' type
/// </summary>
public ICollection<IPropertyMapElement> TypeElements { get; set; }
}
}
6 changes: 3 additions & 3 deletions Source/EntityFramework.Extended/Mapping/EntityMap.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@ public EntityMap(Type entityType)
{
_entityType = entityType;
_keyMaps = new List<PropertyMap>();
_propertyMaps = new List<PropertyMap>();
_propertyMaps = new List<IPropertyMapElement>();
}

/// <summary>
Expand Down Expand Up @@ -57,11 +57,11 @@ public Type EntityType
/// </value>
public string TableName { get; set; }

private readonly List<PropertyMap> _propertyMaps;
private readonly List<IPropertyMapElement> _propertyMaps;
/// <summary>
/// Gets the property maps.
/// </summary>
public List<PropertyMap> PropertyMaps
public List<IPropertyMapElement> PropertyMaps
{
get { return _propertyMaps; }
}
Expand Down
19 changes: 19 additions & 0 deletions Source/EntityFramework.Extended/Mapping/IPropertyMapElement.cs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,19 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace EntityFramework.Mapping
{
/// <summary>
/// Interface representing a property map element which can be single or complex
/// </summary>
public interface IPropertyMapElement
{
/// <summary>
/// Gets or sets the name of the property.
/// </summary>
string PropertyName { get; set; }
}
}
2 changes: 1 addition & 1 deletion Source/EntityFramework.Extended/Mapping/PropertyMap.cs
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Expand Up @@ -6,7 +6,7 @@ namespace EntityFramework.Mapping
/// A class representing a property map
/// </summary>
[DebuggerDisplay("Property: {PropertyName}, Column: {ColumnName}")]
public class PropertyMap
public class PropertyMap: IPropertyMapElement
{
/// <summary>
/// Gets or sets the name of the property.
Expand Down
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