LINQ to Lucene

New Post: NuGet package of this library.

RredCat — Wed, 03 Apr 2013 14:35:53 GMT

Hi guys,

Are you going to upload this package on NuGet?

New Post: Parse Exception. EF

pe4aiko — Wed, 13 Mar 2013 20:21:53 GMT

Hello, I have an error with stacktrace:

[ParseException: Encountered " ":" ": "" at line 1, column 14.
Was expecting one of:
    <AND> ...
    <OR> ...
    <NOT> ...
    "+" ...
    "-" ...
    "(" ...
    ")" ...
    "*" ...
    "^" ...
    <QUOTED> ...
    <TERM> ...
    <FUZZY_SLOP> ...
    <PREFIXTERM> ...
    <WILDTERM> ...
    "[" ...
    "{" ...
    <NUMBER> ...
    ]
   Lucene.Net.QueryParsers.QueryParser.Jj_consume_token(Int32 kind) +191
   Lucene.Net.QueryParsers.QueryParser.Clause(String field) +238
   Lucene.Net.QueryParsers.QueryParser.Query(String field) +64
   Lucene.Net.QueryParsers.QueryParser.Parse(String query) +89

[ParseException: Cannot parse '(Title:Content:Page)': Encountered " ":" ": "" at line 1, column 14.

Here is my class:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Data.Linq.Mapping;
using System.Linq;
using Lucene.Linq.Mapping;
using Lucene.Linq.Search;
using Pollmerica.Core;
using Pollmerica.Core.Checker;
using Pollmerica.Dal.Models.Comments;
using Pollmerica.Dal.Models.Features;
using Pollmerica.Dal.Models.Votes;

namespace Pollmerica.Dal.Models.Articles
{
[Document]
    [Table(Name = "dbo.ContentBases")]
    public partial class Page : ContentBase
    {
        public Page()
            : base()
        {
        }
    }
    public class ContentBase : EntityBase
    {
        private string title;
        private string content;
        public ContentBase() : base()
        {
        }

        [Field(FieldIndex.Tokenized, FieldStore.Yes, IsDefault = true)]
        [Column(Storage = "title")]
        public string Title
        {
            get { return this.title; }
            set
            {
                if ((this.title != value))
                {
                    this.title = value;
                }
            }
        }

        [Field(FieldIndex.Tokenized)]
        public string Content { get; set; } 
   }
public partial class EntityBase : IIndexable, INotifyPropertyChanging, INotifyPropertyChanged
    {
        private static readonly PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);

        partial void OnCreated();

        public EntityBase()
        {
            this.OnCreated();
        }

        /// <summary>
        /// Gets or sets the id.
        /// </summary>
        public int Id { get; set; }
        
        public event PropertyChangedEventHandler PropertyChanged;

        public event PropertyChangingEventHandler PropertyChanging;

        protected virtual void SendPropertyChanging()
        {
            if ((this.PropertyChanging != null))
            {
                this.PropertyChanging(this, emptyChangingEventArgs);
            }
        }

        protected virtual void SendPropertyChanged(string propertyName)
        {
            if ((this.PropertyChanged != null))
            {
                this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }
    }

And usage:

Directory directory = new RAMDirectory();

            var myIndexContext = new MyIndexContext(directory, new MyContext());
            myIndexContext.Write<Page>();
            IQueryable<Page> query0 = from c in myIndexContext.Pages
                                      select c;

            IQueryable<Page> query1 = from c in myIndexContext.Pages
                                      where c.Title == "Page"
                                      select c;

            var list0 = query0.ToPagedList(page ?? 0, pageSize);
            var list1 = query1.ToPagedList(page ?? 0, pageSize);

There are 6 items in list0. And I got an error when try to fill list1.
When I remove attribute Field from Content property of ContentBase class, program works without errors.
Help me please.

New Post: Azure Table support for lucene indexing.

roshanjose — Fri, 22 Feb 2013 08:43:20 GMT

Can some share the information or samples on how I can index azure table data into index files stored in azure table store using linqtolucene?

Any help in this regard would be highly appreciated.

Regards
Roshan

New Post: Entity Framework?

fabriciom — Mon, 08 Oct 2012 19:29:23 GMT

Hello,

I havent really looked into the code or the inner working of your project. But for what it seems you are using Entity Framework. Is this correct? I though the whole purpose of the speed in lucene was that it was a file based NoSQL database. Why ruin it with EF?

New Post: Is there any sample of Repository Pattern?

omerfarukz — Sat, 06 Oct 2012 23:05:08 GMT

Hi, i am looking for real world repository sample but i can not found it? Help me any one to guide sample repository declaration on asp.net. Thanks

Source code checked in, #96133

Project Collection Service Accounts — Mon, 01 Oct 2012 21:40:31 GMT

Upgrade: New Version of LabDefaultTemplate.xaml. To upgrade your build definitions, please visit the following link: http://go.microsoft.com/fwlink/?LinkId=254563

Source code checked in, #96132

Project Collection Service Accounts — Mon, 01 Oct 2012 21:33:03 GMT

Checked in by server upgrade

Created Issue: Not possible to select to a new object... [15620]

cmwalolo — Mon, 17 Sep 2012 11:37:50 GMT

var pp = (from p in runs
where
p.Field == field &&
p.Value.Between(value1, value2)
select p);

foreach(var ppp in pp)
{
runList.Add(new IndexedRunContainer { StoredIndex = ppp.Index, Position = ppp.Position });
}

Totally useless.... I give up !

Created Issue: LINQ Queries and CompareTo [15619]

cmwalolo — Mon, 17 Sep 2012 11:09:32 GMT

return (from IndexedValueSetAndRun p in runs.Where(p=>
p.Field == field &&
(p.Value.CompareTo(value1) >= 0 && p.Value.CompareTo(value2) <= 0))
select new IndexedRunContainer { StoredIndex = p.Index, Position = p.Position }).ToList();

{"Method 'CompareTo' has no supported translation to Lucene"}

I'm so happy to have started with it... ! Source code is not compiling (compiling but not working)... And Binaries do not fit :-)

New Post: Please Keep Up The Good Work!

M3 — Thu, 06 Sep 2012 12:06:52 GMT

stemarie

Lucene is an awesomely powerful search engine. But with it's awesomeness also comes a high degree of difficulty for implementation. LINQ to Lucene has simplified Lucene implementation while providing LINQ programmers with a familiar environment. Documentation is sparse and I would be willing to help compile any information you have or know of on the topic of LINQ to Lucene.

LINQ to Lucene is a wonderful project and you should continue with its development. As this project matures, more people will come to understand that LINQ to Lucene is a simple, user-friendly answer to thier "Full-Text Indexing" needs. Keep the faith and stay with the program, bro. It really is that awesome!

New Post: Create index in database

tulioccalazans — Wed, 05 Sep 2012 16:42:51 GMT

Hi, Is there any way to create indexes directly in the database? Is this technique interesting?

Using this technique, the processes of create indexes and search could lose performance?

Source code checked in, #94040

stemarie — Fri, 20 Jul 2012 18:51:47 GMT

New Post: Is the project active?

georgiosd — Fri, 20 Jul 2012 14:33:08 GMT

I'm guessing it's probably a design issue and maybe not an implementation issue.

Here's what I do:

A1) Define a EfDatabaseIndexSet with a DbContext

A2) Load some objects in the DbContext

A3) Do index.Write<T>()

A4) Run queries on index

At this point, you can read objects fine.

However, if you let the application finish, and run again with:

B1) Create EfDatabaseIndexSet

B2) Try to query => no results because index was deleted on initialization

So what I figured out I had to do is:

C1) Do A1-A3 to create the index from the existing database objects

C2) Call index.Get<T>().Dispose

C3) Create a new Index<T> with the same AzureDirectory object

C4) Run queries successfully

So, it's possible - just a bit counter-intuitive... I would have expected that the Db Helper can:

a) Index the existing DB objects (does this) the first it is run

b) Read/Update and existing index with manual steps

c) If possible, update the index automatically - probably too chaotic to implement

Georgios

Commented Issue: Bug that resets indexes [15433]

stemarie — Fri, 20 Jul 2012 14:22:03 GMT

It seems that EfDatabaseIndexSet.Write<T>() generates the index fine, I can query and everything.

However, if I reload the application, the index gets deleted and I have to recreate it.

Is there any way to override this behavior? I want to generate the index on demand and add objects as I add them to the DB.
Comments: ** Comment from web user: stemarie **

Because lock is never released, it forced a recreation of the index as a safety measure.
This will have to be changed as I consider it unacceptable since data could be lost.

Commented Issue: Bug that resets indexes [15433]

stemarie — Fri, 20 Jul 2012 13:57:06 GMT

write.lock is also left there

Commented Issue: Bug that resets indexes [15433]

stemarie — Fri, 20 Jul 2012 13:56:48 GMT

Repro steps:
Run Demo.exe
Index is created
Run Demo.exe
On Line 150 of IndexSet.cs the index is reinitialized

Code:
// create the index using the single LDirectory parameter ctor
context = Activator.CreateInstance(genericIndexType, LuceneDirectory) as IIndex;

New Post: Is the project active?

stemarie — Fri, 20 Jul 2012 13:48:29 GMT

Georgiosd,

If possible, can you give me the simplest repro-steps so that I can reproduce with minimal effort and just use my time to fix it?

Would much appreciate it - thanks,

Source code checked in, #94033

stemarie — Fri, 20 Jul 2012 13:46:35 GMT

Source code checked in, #94032

stemarie — Fri, 20 Jul 2012 13:44:42 GMT

Branched from $/linqtolucene/trunk

Source code checked in, #94031

stemarie — Fri, 20 Jul 2012 13:43:54 GMT

Minor refactoring