ConferenceRepository.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.EntityFrameworkCore;
using ScientificReport.DAL.DbContext;
using ScientificReport.DAL.Entities;
using ScientificReport.DAL.Interfaces;

namespace ScientificReport.DAL.Repositories
{
    public class ConferenceRepository : IRepository<Conference>
    {
        private readonly ScientificReportDbContext _context;

        public ConferenceRepository(ScientificReportDbContext context)
        {
            _context = context;
        }

        public virtual IEnumerable<Conference> All()
        {
            return _context.Conferences;
        }

        public virtual IEnumerable<Conference> AllWhere(Func<Conference, bool> predicate)
        {
            return All().Where(predicate);
        }

        public virtual Conference Get(Guid id)
        {
            return All().FirstOrDefault(u => u.Id == id);
        }

        public virtual Conference Get(Func<Conference, bool> predicate)
        {
            return All().Where(predicate).FirstOrDefault();
        }

        public virtual void Create(Conference item)
        {
            _context.Conferences.Add(item);
            _context.SaveChanges();
        }

        public virtual void Update(Conference item)
        {
            if (item == null) return;
            _context.Conferences.Update(item);
            _context.SaveChanges();
        }

        public virtual void Delete(Guid id)
        {
            var item = _context.Conferences.Find(id);
            if (item == null)
            {
                return;
            }
            
            _context.Conferences.Remove(item);
            _context.SaveChanges();
        }

        public virtual IQueryable<Conference> GetQuery()
        {
            return _context.Conferences;
        }
    }
}