public IQueryable <TEntity> Apply(IQueryable <TEntity> query)
{
var terms = GetValidTerms().ToArray();
if (!terms.Any())
{
return(query);
}
var modifiedQuery = query;
foreach (var term in terms)
{
var propertyInfo = ExpressionHelper.GetPropertyInfo <TEntity>(term.Name);
var obj = ExpressionHelper.Parameter <TEntity>();
//build the linq expression backwards
//query = query.where(x => x.Property == "Value");
//x.property
var left = ExpressionHelper.GetPropertyExpression(obj, propertyInfo);
//"Value"
var right = Expression.Constant(term.Value);
//x.property == "value"
var ExpressionProvider = new DecimalToIntSearchExpressionProvider();
var comparisonExpression = ExpressionProvider.GetComparison(left, term.operators, right);
// var comparisonExpression = Expression.Equal(left, right);
//x=> x.property == value
var lambdaExpression = ExpressionHelper.GetLambda <TEntity, bool>(obj, comparisonExpression);
//query = query.Where
modifiedQuery = ExpressionHelper.CallWhere(modifiedQuery, lambdaExpression);
}
return(modifiedQuery);
}
public SearchableDecimalAttribute()
{
ExpressionProvider = new DecimalToIntSearchExpressionProvider();
}