ascott18 / entityframework-plus

Entity Framework Utilities | Bulk Operations | Batch Delete | Batch Update | Query Cache | Query Filter | Query Future | Query Include | Audit

Improve Entity Framework performance and overcome limitations with MUST-HAVE features

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Full Version	NuGet	NuGet Install
Z.EntityFramework.Plus.EFCore		PM> Install-Package Z.EntityFramework.Plus.EFCore
Z.EntityFramework.Plus.EF6		PM> Install-Package Z.EntityFramework.Plus.EF6
Z.EntityFramework.Plus.EF5		PM> Install-Package Z.EntityFramework.Plus.EF5

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Features

• Batch Operations
  • Batch Delete
  • Batch Update
• LINQ
  • LINQ Dynamic
• Query
  • Query Cache
  • Query Deferred
  • Query Filter
  • Query Future
  • Query IncludeFilter
  • Query IncludeOptimized
• Audit

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Bulk Operations only available with Entity Framework Extensions

• BulkSaveChanges
• BulkInsert
• BulkUpdate
• BulkDelete
• BulkMerge

---

Batch Delete

Deletes multiples rows in a single database roundtrip and without loading entities in the context.

// using Z.EntityFramework.Plus; // Don't forget to include this.

// DELETE all users which has been inactive for 2 years
ctx.Users.Where(x => x.LastLoginDate < DateTime.Now.AddYears(-2))
         .Delete();

// DELETE using a BatchSize
ctx.Users.Where(x => x.LastLoginDate < DateTime.Now.AddYears(-2))
         .Delete(x => x.BatchSize = 1000);

Support: EF5, EF6, EF Core

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Batch Update

Updates multiples rows using an expression in a single database roundtrip and without loading entities in the context.

// using Z.EntityFramework.Plus; // Don't forget to include this.

// UPDATE all users which has been inactive for 2 years
ctx.Users.Where(x => x.LastLoginDate < DateTime.Now.AddYears(-2))
         .Update(x => new User() { IsSoftDeleted = 1 });

Support: EF5, EF6, EF Core

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Query Cache

Query cache is the second level cache for Entity Framework.

The result of the query is returned from the cache. If the query is not cached yet, the query is materialized and cached before being returned.

You can specify cache policy and cache tag to control CacheItem expiration.

Support:

Cache Policy

// The query is cached using default QueryCacheManager options
var countries = ctx.Countries.Where(x => x.IsActive).FromCache();

// (EF5 | EF6) The query is cached for 2 hours
var states = ctx.States.Where(x => x.IsActive).FromCache(DateTime.Now.AddHours(2));

// (EF7) The query is cached for 2 hours without any activity
var options = new MemoryCacheEntryOptions() { SlidingExpiration = TimeSpan.FromHours(2)};
var states = ctx.States.Where(x => x.IsActive).FromCache(options);

Cache Tags

var states = db.States.Where(x => x.IsActive).FromCache("countries", "states");
var stateCount = db.States.Where(x => x.IsActive).DeferredCount().FromCache("countries", "states");

// Expire all cache entry using the "countries" tag
QueryCacheManager.ExpireTag("countries");

Support: EF5, EF6, EF Core

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Query Deferred

Defer the execution of a query which is normally executed to allow some features like Query Cache and Query Future.

// Oops! The query is already executed, we cannot use Query Cache or Query Future features
var count = ctx.Customers.Count();

// Query Cache
ctx.Customers.DeferredCount().FromCache();

// Query Future
ctx.Customers.DeferredCount().FutureValue();

All LINQ extensions are supported: Count, First, FirstOrDefault, Sum, etc.

Support: EF5, EF6, EF Core

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Query Filter

Filter query with predicate at global, instance or query level.

Support:

Global Filter

// CREATE global filter
QueryFilterManager.Filter<Customer>(x => x.Where(c => c.IsActive));

var ctx = new EntityContext();

// TIP: Add this line in EntitiesContext constructor instead
QueryFilterManager.InitilizeGlobalFilter(ctx);

// SELECT * FROM Customer WHERE IsActive = true
var customer = ctx.Customers.ToList();

Instance Filter

var ctx = new EntityContext();

// CREATE filter
ctx.Filter<Customer>(x => x.Where(c => c.IsActive));

// SELECT * FROM Customer WHERE IsActive = true
var customer = ctx.Customers.ToList();

Query Filter

var ctx = new EntityContext();

// CREATE filter disabled
ctx.Filter<Customer>(CustomEnum.EnumValue, x => x.Where(c => c.IsActive), false);

// SELECT * FROM Customer WHERE IsActive = true
var customer = ctx.Customers.Filter(CustomEnum.EnumValue).ToList();

Support: EF5, EF6, EF Core

Learn more

Query Future

Query Future allow to reduce database roundtrip by batching multiple queries in the same sql command.

All future query are stored in a pending list. When the first future query require a database roundtrip, all query are resolved in the same sql command instead of making a database roundtrip for every sql command.

Support:

Future

// GET the states & countries list
var futureCountries = db.Countries.Where(x => x.IsActive).Future();
var futureStates = db.States.Where(x => x.IsActive).Future();

// TRIGGER all pending queries (futureCountries & futureStates)
var countries = futureCountries.ToList();

FutureValue

// GET the first active customer and the number of avtive customers
var futureFirstCustomer = db.Customers.Where(x => x.IsActive).DeferredFirstOrDefault().FutureValue();
var futureCustomerCount = db.Customers.Where(x => x.IsActive).DeferredCount().FutureValue();

// TRIGGER all pending queries (futureFirstCustomer & futureCustomerCount)
Customer firstCustomer = futureFirstCustomer.Value;

Support: EF5, EF6, EF Core

Learn more

Query IncludeFilter

Entity Framework already support eager loading however the major drawback is you cannot control what will be included. There is no way to load only active item or load only the first 10 comments.

EF+ Query Include make it easy:

var ctx = new EntityContext();

// Load only active comments
var posts = ctx.Post.IncludeFilter(x => x.Comments.Where(x => x.IsActive));

Support: EF6

Learn more

Query IncludeOptimized

Improve SQL generate by Include and filter child collections at the same times!

var ctx = new EntityContext();

// Load only active comments using an optimized include
var posts = ctx.Post.IncludeOptimized(x => x.Comments.Where(x => x.IsActive));

Support: EF5, EF6

Learn more

Audit

Allow to easily track changes, exclude/include entity or property and auto save audit entries in the database.

Support:

• AutoSave Audit
• Exclude & Include Entity
• Exclude & Include Property
• Format Value
• Ignore Events
• Property Unchanged
• Soft Add & Soft Delete

// using Z.EntityFramework.Plus; // Don't forget to include this.

var ctx = new EntityContext();
// ... ctx changes ...

var audit = new Audit();
audit.CreatedBy = "ZZZ Projects"; // Optional
ctx.SaveChanges(audit);

// Access to all auditing information
var entries = audit.Entries;
foreach(var entry in entries)
{
    foreach(var property in entry.Properties)
    {
    }
}

AutoSave audit in your database

AuditManager.DefaultConfiguration.AutoSavePreAction = (context, audit) =>
    (context as EntityContext).AuditEntries.AddRange(audit.Entries);

Support: EF5, EF6, EF Core

Learn more

Contribute

The best way to contribute is by spreading the word about the library:

• Blog it
• Comment it
• Fork it
• Star it
• Share it

A HUGE THANKS for your help.

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• EntityFramework Extensions
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• Eval-SQL.NET
• Eval-Expression.NET

Others

• Extension Methods Library
• LINQ Async

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