---
name: orchardcore-content-queries
description: Skill for querying content items in Orchard Core using YesSql. Covers ContentItemIndex queries, custom index creation, ISession usage, IContentManager queries, and query optimization patterns. Use this skill when requests mention Orchard Core Content Queries, Query Content Items, Querying with ContentItemIndex, ContentItemIndex Fields Reference, Creating a Custom YesSql Index, Registering Custom Index and Migration, or closely related Orchard Core implementation, setup, extension, or troubleshooting work. Strong matches include work with OrchardCore.ContentManagement, OrchardCore.ContentManagement.Records, OrchardCore.Data.Migration, ContentItemIndex, ISession, IContentManager, ContentQueryService, IEnumerable, TitlePart, MapIndex. It also helps with content queries examples, Creating a Custom YesSql Index, Registering Custom Index and Migration, Registering Index Provider in Startup, plus the code patterns, admin flows, recipe steps, and referenced examples captured in this skill.
license: Apache-2.0
metadata:
  author: CrestApps Team
  version: "1.0"
---

# Orchard Core Content Queries - Prompt Templates

## Query Content Items

You are an Orchard Core expert. Generate code for querying content items using YesSql indexes and IContentManager.

### Guidelines

- Orchard Core uses YesSql as its document database abstraction over SQL.
- `ISession` is the primary interface for querying YesSql indexes.
- `ContentItemIndex` is the built-in index for all content items.
- Custom indexes can be created for frequently queried fields.
- `IContentManager` provides higher-level content operations (Get, New, Create, Publish).
- Always use `async/await` patterns for database queries.
- Use `.With<IndexType>()` to join against specific indexes.
- Keep YesSql predicates translatable: use comparisons, null checks, and boolean `&&` / `||`, but avoid ternaries and other conditional expressions inside query lambdas.
- If null and non-null rows need different query logic, split the query into multiple supported YesSql expressions and combine the results in memory.
- Use literal column names in `CreateMapIndexTableAsync()` and `AlterIndexTableAsync()` for custom YesSql migrations; do not use `nameof(...)`.
- `MapIndex` tables already include the `DocumentId` column automatically, so do not add it manually in the migration.
- Always seal classes.

### Querying with ContentItemIndex

```csharp
using OrchardCore.ContentManagement;
using OrchardCore.ContentManagement.Records;
using YesSql;

public sealed class ContentQueryService
{
    private readonly ISession _session;

    public ContentQueryService(ISession session)
    {
        _session = session;
    }

    // Query by content type
    public async Task<IEnumerable<ContentItem>> GetByTypeAsync(string contentType)
    {
        return await _session
            .Query<ContentItem, ContentItemIndex>(x => x.ContentType == contentType && x.Published)
            .ListAsync();
    }

    // Query by content type with paging
    public async Task<IEnumerable<ContentItem>> GetPagedAsync(string contentType, int page, int pageSize)
    {
        return await _session
            .Query<ContentItem, ContentItemIndex>(x => x.ContentType == contentType && x.Published)
            .OrderByDescending(x => x.CreatedUtc)
            .Skip((page - 1) * pageSize)
            .Take(pageSize)
            .ListAsync();
    }

    // Query by display text
    public async Task<ContentItem> GetByDisplayTextAsync(string displayText)
    {
        return await _session
            .Query<ContentItem, ContentItemIndex>(x => x.DisplayText == displayText && x.Published)
            .FirstOrDefaultAsync();
    }

    // Count content items
    public async Task<int> CountByTypeAsync(string contentType)
    {
        return await _session
            .Query<ContentItem, ContentItemIndex>(x => x.ContentType == contentType && x.Published)
            .CountAsync();
    }

    // Query latest versions (including drafts)
    public async Task<IEnumerable<ContentItem>> GetLatestAsync(string contentType)
    {
        return await _session
            .Query<ContentItem, ContentItemIndex>(x => x.ContentType == contentType && x.Latest)
            .ListAsync();
    }
}
```

### ContentItemIndex Fields Reference

The built-in `ContentItemIndex` has these fields:

- `ContentItemId` — Unique content item identifier.
- `ContentItemVersionId` — Version-specific identifier.
- `ContentType` — The content type name.
- `DisplayText` — The display text (usually from TitlePart).
- `Published` — Whether this version is the published one.
- `Latest` — Whether this version is the latest one.
- `CreatedUtc` — When the content item was created.
- `ModifiedUtc` — When the content item was last modified.
- `PublishedUtc` — When the content item was published.
- `Owner` — The owner user ID.
- `Author` — The author user name.

### Creating a Custom YesSql Index

```csharp
using OrchardCore.ContentManagement;
using YesSql.Indexes;

public sealed class {{PartName}}Index : MapIndex
{
    public string ContentItemId { get; set; }
    public string {{PropertyName}} { get; set; }
    public bool Published { get; set; }
}

public sealed class {{PartName}}IndexProvider : IndexProvider<ContentItem>
{
    public override void Describe(DescribeContext<ContentItem> context)
    {
        context.For<{{PartName}}Index>()
            .When(contentItem => contentItem.Has<{{PartName}}>())
            .Map(contentItem =>
            {
                if (!contentItem.TryGet<{{PartName}}>(out var part))
                {
                    return null;
                }

                return new {{PartName}}Index
                {
                    ContentItemId = contentItem.ContentItemId,
                    {{PropertyName}} = part.{{PropertyName}},
                    Published = contentItem.Published
                };
            });
    }
}
```

### Registering Custom Index and Migration

```csharp
using OrchardCore.Data.Migration;
using YesSql.Sql;

public sealed class Migrations : DataMigration
{
    public async Task<int> CreateAsync()
    {
        await SchemaBuilder.CreateMapIndexTableAsync<{{PartName}}Index>(table => table
            .Column<string>("ContentItemId", col => col.WithLength(26))
            .Column<string>("{{PropertyName}}", col => col.WithLength(256))
            .Column<bool>("Published")
        );

        await SchemaBuilder.AlterIndexTableAsync<{{PartName}}Index>(table => table
            .CreateIndex("IDX_{{PartName}}Index_{{PropertyName}}",
                "{{PropertyName}}",
                "Published"))
        );

        return 1;
    }
}
```

### Registering Index Provider in Startup

```csharp
using OrchardCore.Data.Migration;
using YesSql.Indexes;

public sealed class Startup : StartupBase
{
    public override void ConfigureServices(IServiceCollection services)
    {
        services.AddIndexProvider<{{PartName}}IndexProvider>();
        services.AddScoped<IDataMigration, Migrations>();
    }
}
```

### Querying with Custom Index

```csharp
public sealed class {{PartName}}QueryService
{
    private readonly ISession _session;

    public {{PartName}}QueryService(ISession session)
    {
        _session = session;
    }

    public async Task<IEnumerable<ContentItem>> GetByPropertyAsync(string value)
    {
        return await _session
            .Query<ContentItem, {{PartName}}Index>(x => x.{{PropertyName}} == value && x.Published)
            .ListAsync();
    }
}
```

### Using IContentManager

```csharp
using OrchardCore.ContentManagement;

public sealed class ContentService
{
    private readonly IContentManager _contentManager;

    public ContentService(IContentManager contentManager)
    {
        _contentManager = contentManager;
    }

    // Get by ID
    public async Task<ContentItem> GetByIdAsync(string contentItemId)
    {
        return await _contentManager.GetAsync(contentItemId);
    }

    // Get specific version
    public async Task<ContentItem> GetVersionAsync(string contentItemId, string versionId)
    {
        return await _contentManager.GetVersionAsync(versionId);
    }

    // Create new content item
    public async Task<ContentItem> CreateAsync(string contentType)
    {
        var contentItem = await _contentManager.NewAsync(contentType);
        await _contentManager.CreateAsync(contentItem, VersionOptions.Draft);
        return contentItem;
    }

    // Publish a content item
    public async Task PublishAsync(ContentItem contentItem)
    {
        await _contentManager.PublishAsync(contentItem);
    }

    // Update content item
    public async Task UpdateAsync(ContentItem contentItem)
    {
        await _contentManager.UpdateAsync(contentItem);
    }

    // Remove content item
    public async Task RemoveAsync(ContentItem contentItem)
    {
        await _contentManager.RemoveAsync(contentItem);
    }
}
```

### Querying with SQL Directly (Advanced)

For complex queries that can't be expressed with YesSql indexes:

```csharp
using YesSql;

public sealed class AdvancedQueryService
{
    private readonly ISession _session;

    public AdvancedQueryService(ISession session)
    {
        _session = session;
    }

    public async Task<IEnumerable<ContentItem>> QueryWithSqlAsync()
    {
        return await _session
            .Query<ContentItem, ContentItemIndex>()
            .Where(x => x.Published && x.ContentType == "Article")
            .OrderByDescending(x => x.PublishedUtc)
            .Take(10)
            .ListAsync();
    }
}
```