Add low level search example

examples/Redis.OM.LowLevelSearchIndex/Helpers/RedisHelper.cs

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+using Redis.OM.BasicMatchingQueries.Models;
+using Redis.OM.Searching;
+
+namespace Redis.OM.LowLevelSearchIndex.Helpers;
+
+public class RedisHelper
+{
+    private readonly IRedisCollection<Customer> _customerCollection;
+
+    public RedisHelper(RedisConnectionProvider provider)
+    {
+        _customerCollection = provider.RedisCollection<Customer>();
+    }
+
+    public void InitializeCustomers()
+    {
+        var count = _customerCollection.Count();
+        if (count > 0)
+        {
+            // not re-add when already initialize
+            return;
+        }
+
+        Console.WriteLine("Initialize Customer Data...");
+
+        _customerCollection.Insert(new Customer()
+        {
+            FirstName = "Customer",
+            LastName = "2",
+            Age = 20,
+            IsActive = true,
+            Email = "[email protected]",
+        });
+
+        _customerCollection.Insert(new Customer()
+        {
+            FirstName = "Customer",
+            LastName = "3",
+            Age = 25,
+            IsActive = false,
+            Email = "[email protected]",
+        });
+
+        _customerCollection.Insert(new Customer()
+        {
+            FirstName = "Testable",
+            LastName = "Customer 2",
+            Age = 99,
+            IsActive = true,
+            Email = "[email protected]",
+        });
+
+        _customerCollection.Insert(new Customer()
+        {
+            FirstName = "Sharon",
+            LastName = "Lim",
+            Age = 25,
+            IsActive = true,
+            Email = "[email protected]",
+        });
+    }
+
+}

examples/Redis.OM.LowLevelSearchIndex/Models/Customer.cs

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+namespace Redis.OM.BasicMatchingQueries.Models;
+
+using Redis.OM.Modeling;
+
+[Document(StorageType = StorageType.Json, IndexName = "customer-idx")]
+public class Customer
+{
+   [Searchable] public string FirstName { get; set; }
+   [Searchable] public string LastName { get; set; }
+   [Searchable] public string Email { get; set; }
+   [Indexed(Sortable = true)] public int Age { get; set; }
+   [Indexed] public bool IsActive { get; set; }
+}

examples/Redis.OM.LowLevelSearchIndex/Program.cs

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+using Redis.OM;
+using Redis.OM.BasicMatchingQueries.Models;
+using Redis.OM.LowLevelSearchIndex.Helpers;
+using Redis.OM.Searching;
+using System.Reflection;
+
+static void ShowCustomers(string type, List<Customer> customers)
+{
+    Console.WriteLine($"Customer {type}: {string.Join(", ", customers.Select(x => $"{x.FirstName} {x.LastName}"))}, total: {customers.Count}.");
+}
+
+var provider = new RedisConnectionProvider("redis://localhost:6379");
+provider.Connection.CreateIndex(typeof(Customer));
+
+var redisHelper = new RedisHelper(provider);
+redisHelper.InitializeCustomers();
+
+var connection = provider.Connection;
+
+var result = connection.Execute("FT.SEARCH", "customer-idx", "@IsActive:{true} @FirstName|LastName:customer");
+var response = new SearchResponse<Customer>(result);
+
+ShowCustomers("Active & First or Last Name have \"customer\"", response.Documents.Values.ToList());
+
+result = connection.Execute("FT.SEARCH", "customer-idx", "(@FirstName|LastName:customer) | (@LastName:customer) => { $weight: 5.0; }");
+response = new SearchResponse<Customer>(result);
+
+ShowCustomers("First or Last Name have \"customer\" but prioritize lastname", response.Documents.Values.ToList());
+
+result = connection.Execute("FT.SEARCH", "customer-idx", "customer");
+response = new SearchResponse<Customer>(result);
+
+ShowCustomers("All customers with fields text that match with \"customer\"", response.Documents.Values.ToList());

examples/Redis.OM.LowLevelSearchIndex/Redis.OM.LowLevelSearchIndex.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Redis.OM" Version="0.3.0" />
+  </ItemGroup>
+
+</Project>