LinqKit | LINQ-like extensions for Swift

by mythz Swift Version: Current License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | LinqKit Summary

LinqKit is a Swift library. LinqKit has no bugs, it has no vulnerabilities and it has low support. However LinqKit has a Non-SPDX License. You can download it from GitHub.

LINQ-like extensions for Swift. Originally extracted from [101 LINQ Samples in Swift] LinqKit gives Swift more functional powers making working with models and collections more enjoyable.

Support

Quality

Security

License

Reuse

Support

LinqKit has a low active ecosystem.

It has 21 star(s) with 1 fork(s). There are 5 watchers for this library.

It had no major release in the last 6 months.

There are 1 open issues and 1 have been closed. On average issues are closed in 260 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of LinqKit is current.

Quality

LinqKit has no bugs reported.

Security

LinqKit has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

LinqKit has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

LinqKit releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

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LinqKit Key Features

No Key Features are available at this moment for LinqKit.

LinqKit Examples and Code Snippets

No Code Snippets are available at this moment for LinqKit.

Community Discussions

Trending Discussions on LinqKit

LinqKit applying nested filtering through extension-method not working

How to filter entities based on list of items in asp.net core

EF Core SQL Filter Translation

PredicateBuilder is not working on EF Core

LinqKit nested invoke "LINQ to Entities does not recognize the method 'Invoke'"

How can I Refactor This To Pass in the "Property to Use" in this Lambda to Make This Method Reusable?

Create a NuGet package of a netcore 3.0 project which is dependent upon netstandard packages

Many to Many using LinqKit with EF Core with Generic class

Complex edit of a body Expression>

EFCore enum to string value conversion not used in where clause

QUESTION

LinqKit applying nested filtering through extension-method not working

Asked 2021-Mar-16 at 10:54

I'm facing a strange behavior using LinqKit with EF Core.

This is my query:

...

ANSWER

Answered 2021-Mar-16 at 10:54

You have to mark your Get method as expandable:

Source https://stackoverflow.com/questions/66640001

QUESTION

How to filter entities based on list of items in asp.net core

Asked 2021-Feb-23 at 14:18

I want to filter records base on predicate in asp.net core.

I have using LinqKit package to build predicate My predicate builder:

...

ANSWER

Answered 2021-Feb-23 at 14:18

Well, filter creation should be improved:

Source https://stackoverflow.com/questions/66327637

QUESTION

EF Core SQL Filter Translation

Asked 2020-Dec-20 at 05:05

I'm using EF Core 5.0.1 with ASP NET 5.0.1 Web API and I want to build a query with PredicateBuilder using LinqKit.Microsoft.EntityFrameworkCore 5.0.2.1

For the purposes of the question I simplified my model to:

...

ANSWER

Answered 2020-Dec-19 at 13:30

You are on the right track with Or predicate, but instead of multiple Or predicates on user.UserDepatments.Any(single_match) you should create single Or based predicate to be used inside the single user.UserDepatments.Any(multi_or_match).

Something like this:

Source https://stackoverflow.com/questions/65369831

QUESTION

PredicateBuilder is not working on EF Core

Asked 2020-Jun-26 at 09:13

public string[] FindAssets2()
{
    string[] result;

    using (var ctx = new StockContext())
    {
        var predicate = PredicateBuilder.New().Or(asset => asset.Symbol.Contains("TSLA"));

        result = ctx.Assets.AsExpandable()
        .Where(predicate)
        .Select(z => z.Symbol)
        .ToArray();
    }

    return result;
}

...

ANSWER

Answered 2020-Jun-26 at 09:13

It seems that EF-core 5 doesn't play nice with AsExpandable. Or rather the other way around. It worked with EF3, but apparently Linqkit isn't resilient to library-specific idiosyncrasies of expression trees.

There is a work-around for this case. As expained here, predicate is not an Expression, but an ExpressionStarter, which implicitly converts to Expression> and Func. Therefore, queries with predicates on top-level entities (say: EF's IQueryables) work without AsExpandable:

Source https://stackoverflow.com/questions/62578505

QUESTION

LinqKit nested invoke "LINQ to Entities does not recognize the method 'Invoke'"

Asked 2020-Jun-19 at 17:13

I do not fully understand why nested invokes in select do not work within LinqKit and was wondering if someone would be able to help me understand.

My problem:

First let me line out what works.

So lets say we have three db objects:

...

ANSWER

Answered 2020-Jun-19 at 17:13

You have to expressly tell linq that you are expanding the sub expressions - just like when you utilize .AsExpandable() on the table - when invoking in a sub set you must expand the parent to traverse the tree and expand the sub expressions.

So.... all you need is to add an Expand to the parent expression, in this case

Source https://stackoverflow.com/questions/62227180

QUESTION

How can I Refactor This To Pass in the "Property to Use" in this Lambda to Make This Method Reusable?

Asked 2020-Feb-07 at 21:34

In my web page, there are multiple textboxes where users can enter complex queries. A complex query can contain any of the following Parameters:

XX* that matches everything starting with XX
*XX for everything ending in XX
*XX* for everything containing XX
XX123-XX129 for everthing matching the inclusive range from XX123 to XX129
XX444 for an exact individual value
... any comma separated combination of any/all of the above

Implementing that is not my problem; my problem is implementing it for multiple values in a reuseable manner.

The sample below filters Items on the Item.Value property.

...

ANSWER

Answered 2020-Feb-07 at 21:34

Write your method to take an ExpressionLambda that represents the field reference:

Source https://stackoverflow.com/questions/60119720

QUESTION

Create a NuGet package of a netcore 3.0 project which is dependent upon netstandard packages

Asked 2020-Feb-02 at 15:32

My solution consist of many projects targeting netcore 3.0, some of these projects have reference to other nuget packages which targets netstandard 2.0.

I want to create one nuget package of a project referencing other projects. In my Azure DevOps pipeline I have the following task to build the nupkg file

...

ANSWER

Answered 2020-Feb-02 at 15:32

The issue is probably caused by an obsolete version of NuGet agent. You can try using NuGet Install Tool task and setup the agent to the v5.x, before using NuGetCommand restore task.

Source https://stackoverflow.com/questions/59981685

QUESTION

Many to Many using LinqKit with EF Core with Generic class

Asked 2019-Dec-27 at 16:15

I'm currently converting an EF project to EF Core but I don't know how or whether it is possible to:

a) Use LinqKit on Many-To-Many with EF Core

b) Use a) with a Generic class

I'm currently using the following class:

...

ANSWER

Answered 2019-Dec-27 at 16:15

The simplest solution would be to use the string overload of the Include.*

Source https://stackoverflow.com/questions/59441837

QUESTION

Complex edit of a body Expression>

Asked 2019-Oct-29 at 08:38

Summary: I want to know how can I detect specific definitions from the expression's body then change it in the way I want, such as

...

ANSWER

Answered 2019-Oct-29 at 08:38

From how I see it, what you need is ExpressionVisitor to traverse and modify ExpressionTree. One thing I would change is the way you call Any. Instead of

Source https://stackoverflow.com/questions/58599779

QUESTION

EFCore enum to string value conversion not used in where clause

Asked 2019-Mar-20 at 15:25

I am having a problem with how my Linq where clause gets translated into Sql.

I am using EnumToStringConverter to map a property of my entity that is an enum into a text db column. This all works fine when just querying my entity from the DbContext.

I then started using LinqKit and Expressions to have reusable filters. I created an Expression that accepts my entity and gives my enum as a result of some calculations on other properties of the entity. I'll try to explain myself with code since words are failing me. I'll write an example so I don't have to post the full code, but the logic will be the same. You can find a GitHub repo with a project to replicate the issue here: https://github.com/pinoy4/efcore-enum-to-string-test

The model classes:

...

ANSWER

Answered 2019-Mar-20 at 15:25

The issue is not related to LinqKit, but the expression itself, specifically the conditional operator and current EF Core 2 query translation and value conversions.

The problem is that currently value conversions are specified per property (column) rather than per type. So in order to be translated correctly to SQL, the translator must "infer" the constant / parameter type from a property. It does that for most of the type of expressions, but not for conditional operator.

So the first thing you should do is to report it to the EF Core issue tracker.

Regarding workaround:

Unfortunately the functionality is inside an infrastructure class called DefaultQuerySqlGenerator, which is inherited by every database provider. The service provided by that class can be replaced, although in a bit complicated way, which can be seen in my answer to Ef-Core - What regex can I use to replace table names with nolock ones in Db Interceptor, and additionally has to be done for every database provider you want to support.

For SqlServer it requires something like this (tested):

Source https://stackoverflow.com/questions/55182602

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install LinqKit

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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