public void ShouldCreateEqualityQueryOnCollectionContainsMethod()
{
Expression<Func<TestClass, bool>> expression = x => x.CollectionData.Contains("5");
var expressionVisitor = new ExpressionVisitor();
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
Assert.That(query, Is.Not.Null);
Assert.That(query.Operand, Is.EqualTo(MongoOperand.Equals));
Assert.That(query.PropertyName, Is.EqualTo("CollectionData"));
Assert.That(query.Value, Is.EqualTo(BsonValue.Create("5")));
Assert.That(query.Inverted, Is.False);
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(Query.EQ("CollectionData", "5").ToString()));
}
private string FindDeepParameter(Expression expression)
{
if (expression.NodeType == ExpressionType.MemberAccess)
{
var memberExpression = expression as MemberExpression;
if (memberExpression != null)
{
var name = memberExpression.Member.Name;
var subName = FindDeepParameter(memberExpression.Expression);
if (!string.IsNullOrEmpty(subName))
{
return subName + "." + name;
}
return name;
}
}
if (expression.NodeType == ExpressionType.Call)
{
var methodCallExpression = expression as MethodCallExpression;
if (methodCallExpression != null &&
methodCallExpression.Method.Name == "get_Item" &&
methodCallExpression.Object != null &&
methodCallExpression.Object.Type.GetGenericTypeDefinition() == typeof(Dictionary<,>))
{
var container = new QueryContainer(new RepositoryQuery());
Visit(null, methodCallExpression.Object, container);
var dictionaryKey = GetValueFromExpression(methodCallExpression.Arguments[0]) as string;
var name = container.Query.PropertyName + "." + dictionaryKey;
return name;
}
}
return string.Empty;
}
public void ShouldSupportToStringOnMemberAccessExpression()
{
const int someConstant = 5;
Expression<Func<TestClass, bool>> expression = x => x.SomeData == someConstant.ToString();
var expressionVisitor = new ExpressionVisitor();
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
Assert.That(query, Is.Not.Null);
Assert.That(query.Inverted, Is.False);
Assert.That(query.Operand, Is.EqualTo(MongoOperand.Equals));
Assert.That(query.Value, Is.EqualTo(BsonValue.Create("5")));
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(Query.EQ("SomeData", "5").ToString()));
}
public void ShouldThrowNotSupportedExceptionOnToStringMethodOnCollectionValue()
{
Expression<Func<TestClass, bool>> expression = x => x.IntData.ToString() == "5";
var expressionVisitor = new ExpressionVisitor();
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
}
public void ShouldSupportQueriesWithMultipleAnds()
{
var expressionVisitor = new ExpressionVisitor();
Expression<Func<TestClass, bool>> expression = x => x.Id == "1" && x.IntData == 2 && x.SomeData == "3";
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
var andQuery = Query.And(Query.EQ("_id", "1"), Query.EQ("IntData", 2), Query.EQ("SomeData", "3"));
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(andQuery.ToString()));
}
public void ShouldSupportQueriesWithOrOperatorAndConstants()
{
var expressionVisitor = new ExpressionVisitor();
Expression<Func<TestClass, bool>> expression = x => x.Id == "5" || x.SomeData == "6";
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
var andQuery = Query.Or(Query.EQ("_id", "5"), Query.EQ("SomeData", "6"));
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(andQuery.ToString()));
}
private void VisitUnary(ParameterExpression[] parameters, UnaryExpression unaryExpression, QueryContainer container)
{
Visit(parameters, unaryExpression.Operand, container);
}
public void ShouldSupportQueriesWithAndOperatorAndConstantVariableExpression()
{
var expressionVisitor = new ExpressionVisitor();
const string idValue = "5";
const string someDataValue = "6";
Expression<Func<TestClass, bool>> expression = x => x.Id == idValue && x.SomeData == someDataValue;
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
var andQuery = Query.And(Query.EQ("_id", idValue), Query.EQ("SomeData", someDataValue));
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(andQuery.ToString()));
}
private void VisitMethodCall(ParameterExpression[] parameters, MethodCallExpression expression, QueryContainer container)
{
var declaringType = expression.Method.DeclaringType;
var enumerableType = (declaringType.GetInterfaces()
.Where(x => x.IsGenericType)
.Where(x => x.GetGenericTypeDefinition() == typeof(IEnumerable<>))
.Select(x => x.GetGenericArguments()[0])
.FirstOrDefault() != null);
if (enumerableType && expression.Method.Name == "Contains")
{
var memberExpression = expression.Object as MemberExpression;
if (memberExpression != null)
{
var constantExpression = memberExpression.Expression as ConstantExpression;
var prop = memberExpression.Member;
var fieldName = prop.Name;
if (constantExpression != null)
{
var value = constantExpression.Value;
var fieldType = value.GetType();
var fieldInfo = fieldType.GetField(fieldName);
var field = fieldInfo.GetValue(value);
var bsonValue = BsonArray.Create(field);
var inverted = container.Query.Inverted;
container.Query = new InRepositoryQuery { Value = bsonValue, Inverted = inverted };
}
}
Visit(parameters, expression.Arguments[0], container);
}
else if ((declaringType == typeof(IEnumerable) || declaringType == typeof(Enumerable) && declaringType != typeof(string) && declaringType.IsPrimitive == false) && expression.Method.Name == "Contains")
{
var inverted = container.Query.Inverted;
var memberExpression = expression.Arguments[0] as MemberExpression;
if (memberExpression != null && memberExpression.Expression is ParameterExpression)
{
container.Query.Operand = MongoOperand.Equals;
}
else
{
container.Query = new InRepositoryQuery { Inverted = inverted };
}
Visit(parameters, expression.Arguments[0], container);
Visit(parameters, expression.Arguments[1], container);
}
else if (expression.Method.Name == "get_Item" &&
expression.Object != null &&
expression.Object.Type.GetGenericTypeDefinition() == typeof(Dictionary<,>))
{
Visit(parameters, expression.Object, container);
var dictionaryKey = GetValueFromExpression(expression.Arguments[0]) as string;
container.Query.PropertyName += "." + dictionaryKey; //Append the dictionary key
}
else if(expression.Method.Name == "IsNullOrEmpty")
{
var orRepositoryQuery = new OrRepositoryQuery
{
LeftContainer = new QueryContainer(new RepositoryQuery())
{
Query =
{
Value = "",
Operand = MongoOperand.Equals,
Inverted = container.Query.Inverted
}
}
};
Visit(null, expression.Arguments[0], orRepositoryQuery.LeftContainer);
orRepositoryQuery.RightContainer = new QueryContainer(new RepositoryQuery())
{
Query =
{
Value = null,
Operand = MongoOperand.Equals,
Inverted = container.Query.Inverted
}
};
Visit(null, expression.Arguments[0], orRepositoryQuery.RightContainer);
container.Query = orRepositoryQuery;
}
else if(expression.Method.Name == "IsNotNullOrEmpty")
{
var orRepositoryQuery = new OrRepositoryQuery
{
LeftContainer = new QueryContainer(new RepositoryQuery())
{
Query =
{
Value = "",
Operand = MongoOperand.NotEquals
}
}
};
Visit(null, expression.Arguments[0], orRepositoryQuery.LeftContainer);
orRepositoryQuery.RightContainer = new QueryContainer(new RepositoryQuery())
{
Query =
{
Value = null,
Operand = MongoOperand.NotEquals
}
};
Visit(null, expression.Arguments[0], orRepositoryQuery.RightContainer);
container.Query = orRepositoryQuery;
}
else if (expression.Method.Name == "Parse")
{
var memberExpression = expression.Arguments[0] as MemberExpression;
if (expression.Arguments[0] is ConstantExpression || (memberExpression != null && memberExpression.Expression is ConstantExpression))
{
var value = GetValueFromExpression(expression);
container.Query.Value = BsonValue.Create(value);
}
else
{
throw new NotSupportedException("Parse on non-Constant Expressions is not supported");
}
}
else if (expression.Method.Name == "ToString")
{
var memberExpression = expression.Object as MemberExpression;
if (expression.Object is ConstantExpression || (memberExpression != null && memberExpression.Expression is ConstantExpression))
{
var value = GetValueFromExpression(expression);
container.Query.Value = BsonValue.Create(value);
}
else
{
throw new NotSupportedException("ToString on non-Constant Expressions is not supported");
}
}
else
{
throw new NotSupportedException(string.Format("Method {0} is not supported", expression.Method.Name));
}
}
public void Visit(ParameterExpression[] parameters, Expression expression, QueryContainer container)
{
if (expression == null)
{
return;
}
switch (expression.NodeType)
{
case ExpressionType.Not:
container.Query.Inverted = true;
VisitUnary(parameters, (UnaryExpression)expression, container);
break;
case ExpressionType.Negate:
case ExpressionType.NegateChecked:
case ExpressionType.Convert:
case ExpressionType.ConvertChecked:
case ExpressionType.ArrayLength:
case ExpressionType.Quote:
case ExpressionType.TypeAs:
VisitUnary(parameters, (UnaryExpression)expression, container);
break;
case ExpressionType.And:
case ExpressionType.AndAlso:
VisitBinary(parameters, expression as BinaryExpression, container);
break;
case ExpressionType.Add:
case ExpressionType.AddChecked:
case ExpressionType.Subtract:
case ExpressionType.SubtractChecked:
case ExpressionType.Multiply:
case ExpressionType.MultiplyChecked:
case ExpressionType.Divide:
case ExpressionType.Modulo:
case ExpressionType.Or:
case ExpressionType.OrElse:
case ExpressionType.LessThan:
case ExpressionType.LessThanOrEqual:
case ExpressionType.GreaterThan:
case ExpressionType.GreaterThanOrEqual:
case ExpressionType.Equal:
case ExpressionType.NotEqual:
case ExpressionType.Coalesce:
case ExpressionType.ArrayIndex:
case ExpressionType.RightShift:
case ExpressionType.LeftShift:
case ExpressionType.ExclusiveOr:
VisitBinary(parameters, (BinaryExpression)expression, container);
break;
case ExpressionType.TypeIs:
case ExpressionType.Conditional:
case ExpressionType.Constant:
VisitConstant(expression as ConstantExpression, container);
break;
case ExpressionType.MemberAccess:
VisitMember(parameters, expression, container);
break;
case ExpressionType.Lambda:
VisitLambda((LambdaExpression)expression, container);
break;
case ExpressionType.Call:
VisitMethodCall(parameters, expression as MethodCallExpression, container);
break;
default:
throw new NotSupportedException(string.Format("Unhandled expression type: '{0}'", expression.NodeType));
}
}
private void VisitMember(ParameterExpression[] parameters, Expression expression, QueryContainer container)
{
var memberExpression = (MemberExpression)expression;
var expressionName = expression.ToString();
var subStrings = expressionName.Split('.');
var isDeepParameter = false;
if (subStrings.Length > 0 && parameters != null && parameters.Length > 0)
{
isDeepParameter = parameters[0].ToString() == subStrings[0];
}
if (memberExpression.Expression is ParameterExpression || isDeepParameter)
{
string name;
if (isDeepParameter)
{
name = FindDeepParameter(memberExpression);
}
else
{
name = memberExpression.Member.Name;
}
if (name.ToLower() == "id")
{
name = "_id";
}
container.Query.PropertyName = name;
if (memberExpression.Type == typeof(bool) && container.Query.Operand == MongoOperand.NotSet)
{
container.Query.Operand = MongoOperand.Equals;
container.Query.Value = true;
}
}
else
{
var value = GetValueFromExpression(memberExpression);
container.Query.Value = BsonValue.Create(value);
}
}
private void VisitLambda(LambdaExpression lambdaExpression, QueryContainer container)
{
var newLambdaParam = lambdaExpression.Parameters.ToArray();
Visit(newLambdaParam, lambdaExpression.Body, container);
}
private void VisitBinary(ParameterExpression[] parameters, BinaryExpression binaryExpression, QueryContainer container)
{
QueryContainer queryLeft;
QueryContainer queryRight;
switch (binaryExpression.NodeType)
{
case ExpressionType.AndAlso:
case ExpressionType.And:
var andQuery = new AndRepositoryQuery();
queryLeft = new QueryContainer(new RepositoryQuery());
queryRight = new QueryContainer(new RepositoryQuery());
andQuery.LeftContainer = queryLeft;
andQuery.RightContainer = queryRight;
container.Query = andQuery;
break;
case ExpressionType.Or:
case ExpressionType.OrElse:
var orQuery = new OrRepositoryQuery();
queryLeft = new QueryContainer(new RepositoryQuery());
queryRight = new QueryContainer(new RepositoryQuery());
orQuery.LeftContainer = queryLeft;
orQuery.RightContainer = queryRight;
container.Query = orQuery;
break;
default:
container.Query.Operand = FindMongoOperand(binaryExpression.NodeType);
queryLeft = queryRight = container;
break;
}
Visit(parameters, binaryExpression.Left, queryLeft);
Visit(parameters, binaryExpression.Right, queryRight);
}
public void ShouldSupportImplicitCastWithEnums()
{
var expressionVisitor = new ExpressionVisitor();
Expression<Func<TestClass, bool>> expression = x => x.EnumValue == TestEnum.EnumValue1;
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
Assert.That(query, Is.Not.Null);
Assert.That(query.Operand, Is.EqualTo(MongoOperand.Equals));
Assert.That(query.Inverted, Is.False);
Assert.That(query.PropertyName, Is.EqualTo("EnumValue"));
Assert.That(query.Value, Is.EqualTo(BsonValue.Create(TestEnum.EnumValue1)));
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(Query.EQ("EnumValue", TestEnum.EnumValue1).ToString()));
}
public void ShouldCreateEqualsQueryOnInvertedSimpleDictionaryData()
{
Expression<Func<DictionaryTestClass, bool>> expression = x => !(x.SimpleDictionaryData["myKey"] != "myValue");//I know resharper wants you to refactor this, please don't
var expressionVisitor = new ExpressionVisitor();
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
Assert.That(query, Is.Not.Null);
Assert.That(query.Operand, Is.EqualTo(MongoOperand.NotEquals));
Assert.That(query.Inverted, Is.True);
Assert.That(query.PropertyName, Is.EqualTo("SimpleDictionaryData.myKey"));
Assert.That(query.Value, Is.EqualTo(BsonValue.Create("myValue")));
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(Query.EQ("SimpleDictionaryData.myKey", "myValue").ToString()));
}
public void ShouldSupportParseMethodOnConstantExpression()
{
Expression<Func<TestClass, bool>> expression = x => x.IntData == int.Parse("5");
var expressionVisitor = new ExpressionVisitor();
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
Assert.That(query, Is.Not.Null);
Assert.That(query.Inverted, Is.False);
Assert.That(query.Operand, Is.EqualTo(MongoOperand.Equals));
Assert.That(query.Value, Is.EqualTo(BsonValue.Create(5)));
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(Query.EQ("IntData", 5).ToString()));
}
public void ShouldCreateEqualsQueryOnReallyComplexDictionaryData()
{
Expression<Func<DictionaryTestClass, bool>> expression = x => x.ComplexDictionaryData["myKey"].DeeplyEmbeddedData.EvenMoreData == "myValue";
var expressionVisitor = new ExpressionVisitor();
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
Assert.That(query, Is.Not.Null);
Assert.That(query.Operand, Is.EqualTo(MongoOperand.Equals));
Assert.That(query.Inverted, Is.False);
Assert.That(query.PropertyName, Is.EqualTo("ComplexDictionaryData.myKey.DeeplyEmbeddedData.EvenMoreData"));
Assert.That(query.Value, Is.EqualTo(BsonValue.Create("myValue")));
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(Query.EQ("ComplexDictionaryData.myKey.DeeplyEmbeddedData.EvenMoreData", "myValue").ToString()));
}
public void ShouldSupportQueriesWithAndOperatorAndMemberExpression()
{
var expressionVisitor = new ExpressionVisitor();
// ReSharper disable ConvertToConstant.Local
var idValue = "5"; //these should not be changed to const! That's a different code path
var someDataValue = "6"; //these should not be changed to const! That's a different code path
// ReSharper restore ConvertToConstant.Local
Expression<Func<TestClass, bool>> expression = x => x.Id == idValue && x.SomeData == someDataValue;
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
var andQuery = Query.And(Query.EQ("_id", idValue), Query.EQ("SomeData", someDataValue));
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(andQuery.ToString()));
}
public void ShouldCreateInvertedNotEqualsQuery()
{
var expressionVisitor = new ExpressionVisitor();
Expression<Func<TestClass, bool>> expression = x => !(x.Id != "5");//I know resharper wants you to refactor this, please don't
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
Assert.That(query.Value, Is.EqualTo(BsonValue.Create("5")));
Assert.That(query.Operand, Is.EqualTo(MongoOperand.NotEquals));
Assert.That(query.PropertyName, Is.EqualTo("_id"));
Assert.That(query.Inverted, Is.True);
Assert.That(query.MongoQuery.ToString(),Is.EqualTo(Query.EQ("_id", "5").ToString()));
}
public void ShouldSupportQueriesWithMultipleOrs()
{
var expressionVisitor = new ExpressionVisitor();
Expression<Func<TestClass, bool>> expression = x => x.Id == "1" || x.Id == "2" || x.Id == "3";
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
var orQuery = Query.Or(Query.EQ("_id", "1"), Query.EQ("_id", "2"), Query.EQ("_id", "3"));
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(orQuery.ToString()));
}
public void ShouldCreateLessThanQuery()
{
var expressionVisitor = new ExpressionVisitor();
Expression<Func<TestClass, bool>> expression = x => x.IntData < 5;
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
Assert.That(query.Value, Is.EqualTo(BsonValue.Create(5)));
Assert.That(query.Operand, Is.EqualTo(MongoOperand.LessThan));
Assert.That(query.PropertyName, Is.EqualTo("IntData"));
Assert.That(query.Inverted, Is.False);
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(Query.LT("IntData", 5).ToString()));
}
public void ShouldSupportStringIsNullOrEmpty()
{
Expression<Func<TestClass, bool>> expression = x => string.IsNullOrEmpty(x.SomeData);
var expressionVisitor = new ExpressionVisitor();
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
Assert.That(query, Is.Not.Null);
Assert.That(query.Inverted, Is.False);
Assert.That(query is OrRepositoryQuery);
var queryComplete = Query.Or(Query.EQ("SomeData", ""), Query.EQ("SomeData", BsonNull.Value));
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(queryComplete.ToString()));
}
public void ShouldCreateNotEqualsQueryOnInvertedBooleanValue()
{
Expression<Func<TestClass, bool>> expression = x => !x.Enabled;
var expressionVisitor = new ExpressionVisitor();
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
Assert.That(query, Is.Not.Null);
Assert.That(query.Operand, Is.EqualTo(MongoOperand.Equals));
Assert.That(query.Inverted, Is.True);
Assert.That(query.PropertyName, Is.EqualTo("Enabled"));
Assert.That(query.Value, Is.EqualTo(BsonValue.Create(true)));
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(Query.NE("Enabled", true).ToString()));
}
public void ShouldThrowNotSupportedExceptionOnParseMethodOnCollectionValue()
{
Expression<Func<TestClass, bool>> expression = x => long.Parse(x.Id) == 5;
var expressionVisitor = new ExpressionVisitor();
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
}
public void ShouldCreateNotEqualsQueryOnSimpleDictionaryData()
{
Expression<Func<DictionaryTestClass, bool>> expression = x => x.SimpleDictionaryData["myKey"] != "myValue";
var expressionVisitor = new ExpressionVisitor();
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
Assert.That(query, Is.Not.Null);
Assert.That(query.Operand, Is.EqualTo(MongoOperand.NotEquals));
Assert.That(query.Inverted, Is.False);
Assert.That(query.PropertyName, Is.EqualTo("SimpleDictionaryData.myKey"));
Assert.That(query.Value, Is.EqualTo(BsonValue.Create("myValue")));
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(Query.NE("SimpleDictionaryData.myKey", "myValue").ToString()));
}
public void ShouldThrowNotSupportedOnUnknownOperand()
{
Expression<Func<TestClass, bool>> expression = x => x.SomeData + x.Id == "something";
var expressionVisitor = new ExpressionVisitor();
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
}
public void ShouldCreateNotInQueryOnInvertedParameterContainsMethodUsingList()
{
var dataStrings = new[] {"1", "2"}.ToList();
Expression<Func<TestClass, bool>> expression = x => !dataStrings.Contains(x.Id);
var expressionVisitor = new ExpressionVisitor();
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
Assert.That(query, Is.Not.Null);
var inQuery = Query.NotIn("_id", BsonArray.Create(dataStrings));
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(inQuery.ToString()));
}
public void ShouldCreateEqualsQuery()
{
var expressionVisitor = new ExpressionVisitor();
Expression<Func<TestClass, bool>> expression = x => x.Id == "5";
var repositoryQuery = new RepositoryQuery();
var queryContainer = new QueryContainer(repositoryQuery);
expressionVisitor.Visit(null, expression, queryContainer);
var query = queryContainer.Query;
Assert.That(query.Value, Is.EqualTo(BsonValue.Create("5")));
Assert.That(query.Operand, Is.EqualTo(MongoOperand.Equals));
Assert.That(query.PropertyName, Is.EqualTo("_id"));
Assert.That(query.Inverted, Is.False);
Assert.That(query.MongoQuery.ToString(), Is.EqualTo(Query.EQ("_id", "5").ToString()));
}
private static void VisitConstant(ConstantExpression expression, QueryContainer container)
{
var value = GetValueFromExpression(expression);
container.Query.Value = BsonValue.Create(value);
}