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This article introduces the knowledge of "how to create a full-text index Pomelo.EFCore.MySql". Many people will encounter such a dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Background

Full-text index: MySQL full-text retrieval uses the correlation between query keywords and query column content for retrieval, and full-text index can be used to improve the speed of matching.

Pomelo.EntityFrameworkCore.MySql: a third-party MySQL EntityFrameworkCore driver that is open source in GitHub. Its performance, features and downloads all exceed the official version provided by Oracle. QQ group 522943763.

Use

Full-text indexing is supported on July 28th, and Pomelo.EntityFrameworkCore.MySql 2.0.0-preview3-10049 or later is required.

Create a TestModel class

Class TestModel {

Public Guid Id {get; set;}

Public string Text {get; set;}}

Create the TestContext class and use Fluent API to add indexes and full-text indexes to the Text fields in TestModel

Class TestContext: DbContext {

Public DbSet TestModels {get; set;}

Protected override void OnModelCreating (ModelBuilder modelBuilder) {base.OnModelCreating (modelBuilder); modelBuilder.Entity (e = > {e.HasIndex (x = > x.Text). IsFullText (); / / add full-text index});}

Protected override void OnConfiguring (DbContextOptionsBuilder optionsBuilder) {base.OnConfiguring (optionsBuilder); optionsBuilder.UseMySql ("server=localhost;uid=root;pwd=123456;database=fttest");}}

That is, use .HasIndex (). IsFullText () on the field where you want to add a full-text index.

Next, call DbContext in the Main method to test:

Class Program {

Static void Main (string [] args) {

Var db = new TestContext (); db.Database.EnsureCreated (); Console.WriteLine ("Hello World!");}}

In Navicat, we can see that the full-text index was created successfully:

Matters needing attention

.IsFullText () cannot be used with .IsUnique ().

Users of the InnoDB engine require MySQL 5.6 or later to use this feature

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