diff --git a/README.md b/README.md
index 231fcf8..1260a55 100644
--- a/README.md
+++ b/README.md
@@ -149,7 +149,10 @@ There are 2 ways to create a collection, either via [Ecto schema](https://hexdoc
 
 #### Option 1: using Ecto
 
-In this example, we're adding `person_id` that points to the id of `persons` schema.
+In this example, we're adding `persons_id` that points to the id of `persons` schema.
+
+> **Note**: we're using `<TABLE_NAME>_id`. If you have table
+> e.g. named `persons`, it'll be `persons_id`.
 
 ```elixir
 defmodule Person do
@@ -159,11 +162,11 @@ defmodule Person do
   defimpl Jason.Encoder, for: __MODULE__ do
     def encode(value, opts) do
       value
-      |> Map.take([:id, :person_id, :name, :country])
+      |> Map.take([:id, :persons_id, :name, :country])
       |> Enum.map(fn {key, val} ->
         cond do
           key === :id -> {key, to_string(Map.get(value, :id))}
-          key === :person_id -> {key, Map.get(value, :id)}
+          key === :persons_id -> {key, Map.get(value, :id)}
           true -> {key, val}
         end
       end)
@@ -175,15 +178,18 @@ defmodule Person do
   schema "persons" do
     field(:name, :string)
     field(:country, :string)
-    field(:person_id, :integer, virtual: true)
+    field(:persons_id, :integer, virtual: true)
   end
 
   @impl ExTypesense
   def get_field_types do
+    primary_field = __MODULE__.__schema__(:source) <> "_id"
+
     %{
-      default_sorting_field: "person_id",
+      # Or might as well just write persons_id instead. Up to you.
+      default_sorting_field: primary_field,
       fields: [
-        %{name: "person_id", type: "int32"},
+        %{name: primary_field, type: "int32"},
         %{name: "name", type: "string"},
         %{name: "country", type: "string"}
       ]
@@ -205,10 +211,10 @@ schema = %{
   name: "companies",
   fields: [
     %{name: "company_name", type: "string"},
-    %{name: "company_id", type: "int32"},
+    %{name: "companies_id", type: "int32"},
     %{name: "country", type: "string"}
   ],
-  default_sorting_field: "company_id"
+  default_sorting_field: "companies_id"
 }
 
 ExTypesense.create_collection(schema)
diff --git a/guides/cheatsheet.cheatmd b/guides/cheatsheet.cheatmd
index 4c8b867..1be467f 100644
--- a/guides/cheatsheet.cheatmd
+++ b/guides/cheatsheet.cheatmd
@@ -15,9 +15,9 @@ defmodule MyApp.Listings.Company do
   defimpl Jason.Encoder, for: __MODULE__ do
     def encode(value, opts) do
       value
-      |> Map.take([:company_id, :name, :country])
+      |> Map.take([:companies_id, :name, :country])
       |> Enum.map(fn {key, val} ->
-        if key === :company_id, do: {key, Map.get(value, :id)}, else: {key, val}
+        if key === :companies_id, do: {key, Map.get(value, :id)}, else: {key, val}
       end)
       |> Enum.into(%{})
       |> Jason.Encode.map(opts)
@@ -27,15 +27,17 @@ defmodule MyApp.Listings.Company do
   schema "companies" do
     field(:name, :string)
     field(:country, :string)
-    field(:company_id, :integer, virtual: true)
+    field(:companies_id, :integer, virtual: true)
   end
 
   @impl ExTypesense
   def get_field_types do
+    primary_field = __MODULE__.__schema__(:source) <> "_id"
+
     %{
-      default_sorting_field: "company_id",
+      default_sorting_field: primary_field,
       fields: [
-        %{name: "company_id", type: "int32"},
+        %{name: primary_field, type: "int32"},
         %{name: "name", type: "string"},
         %{name: "country", type: "string"}
       ]
@@ -48,7 +50,7 @@ iex> ExTypesense.create_collection(Company)
 {:ok,
   %ExTypesense.Collection{
     "created_at" => 1234567890,
-    "default_sorting_field" => "company_id",
+    "default_sorting_field" => "companies_id",
     "fields" => [...],
     "name" => "companies",
     "num_documents" => 0,
@@ -67,17 +69,17 @@ iex> schema =
 ...>   name: "companies",
 ...>   fields: [
 ...>     %{name: "company_name", type: "string"},
-...>     %{name: "num_employees", type: "int32"},
+...>     %{name: "companies_id", type: "int32"},
 ...>     %{name: "country", type: "string", facet: true}
 ...>   ],
-...>   default_sorting_field: "num_employees"
+...>   default_sorting_field: "companies_id"
 ...> }
 
 iex> ExTypesense.create_collection(schema)
 {:ok,
   %ExTypesense.Collection{
     "created_at" => 1234567890,
-    "default_sorting_field" => "num_employees",
+    "default_sorting_field" => "companies_id",
     "fields" => [...],
     "name" => "companies",
     "num_documents" => 0,
@@ -110,7 +112,7 @@ iex> ExTypesense.update_collection("companies", schema)
   %ExTypesense.Collection{
     "created_at" => nil,
     "name" => nil,
-    "default_sorting_field" => nil,
+    "default_sorting_field" => "companies_id",
     "fields" => [...],
     "num_documents" => 0,
     "symbols_to_index" => [],
@@ -133,7 +135,7 @@ iex> ExTypesense.create_document(post, :create)
 {:ok,
   %{
     "id" => "12",
-    "post_id" => 12,
+    "posts_id" => 12,
     "title" => "the quick brown fox",
     "collection_name" => "posts"
   }
@@ -152,7 +154,7 @@ iex> ExTypesense.update_document(post, 0)
   %{
     "id" => "0",
     "collection_name" => "posts",
-    "post_id" => 34,
+    "posts_id" => 34,
     "title" => "test",
     "description" => "lorem ipsum"
   }
@@ -170,7 +172,7 @@ iex> ExTypesense.delete_document(Post, 0)
   %{
     "id" => "0",
     "collection_name" => "posts",
-    "post_id" => 34,
+    "posts_id" => 34,
     "title" => "test",
     "description" => "lorem ipsum"
   }
@@ -199,7 +201,7 @@ iex> ExTypesense.search(Post, params)
   %{
     "id" => "0",
     "collection_name" => "posts",
-    "post_id" => 34,
+    "posts_id" => 34,
     "title" => "test",
     "description" => "lorem ipsum"
   }
diff --git a/lib/ex_typesense.ex b/lib/ex_typesense.ex
index c6976eb..2afe415 100644
--- a/lib/ex_typesense.ex
+++ b/lib/ex_typesense.ex
@@ -14,11 +14,11 @@ defmodule ExTypesense do
     defimpl Jason.Encoder, for: __MODULE__ do
       def encode(value, opts) do
         value
-        |> Map.take([:id, :person_id, :name, :age])
+        |> Map.take([:id, :persons_id, :name, :age])
         |> Enum.map(fn {key, val} ->
           cond do
             key === :id -> {key, to_string(Map.get(value, :id))}
-            key === :person_id -> {key, Map.get(value, :id)}
+            key === :persons_id -> {key, Map.get(value, :id)}
             true -> {key, val}
           end
         end)
@@ -30,16 +30,18 @@ defmodule ExTypesense do
     schema "persons" do
       field :name, :string
       field :age, :integer
-      field :person_id, :integer, virtual: true
+      field :persons_id, :integer, virtual: true
     end
 
     @impl ExTypesense
     def get_field_types do
+      primary_field = __MODULE__.__schema__(:source) <> "_id"
+
       %{
-        default_sorting_field: "person_id",
+        default_sorting_field: primary_field,
         fields:
           [
-            %{name: "person_id", type: "int32"},
+            %{name: primary_field, type: "int32"},
             %{name: "name", type: "string"},
             %{name: "age", type: "integer"}
           ]
diff --git a/lib/ex_typesense/collection.ex b/lib/ex_typesense/collection.ex
index 204063e..0bb2049 100644
--- a/lib/ex_typesense/collection.ex
+++ b/lib/ex_typesense/collection.ex
@@ -174,15 +174,15 @@ defmodule ExTypesense.Collection do
       ...>   name: "companies",
       ...>   fields: [
       ...>     %{name: "company_name", type: "string"},
-      ...>     %{name: "company_id", type: "int32"},
+      ...>     %{name: "companies_id", type: "int32"},
       ...>     %{name: "country", type: "string", facet: true}
       ...>   ],
-      ...>   default_sorting_field: "company_id"
+      ...>   default_sorting_field: "companies_id"
       ...> }
       iex> ExTypesense.create_collection(schema)
       %ExTypesense.Collection{
         created_at: 1234567890,
-        default_sorting_field: "company_id",
+        default_sorting_field: "companies_id",
         fields: [...],
         name: "companies",
         num_documents: 0,
@@ -193,7 +193,7 @@ defmodule ExTypesense.Collection do
       iex> ExTypesense.create_collection(Person)
       %ExTypesense.Collection{
         created_at: 1234567890,
-        default_sorting_field: "person_id",
+        default_sorting_field: "persons_id",
         fields: [...],
         name: "persons",
         num_documents: 0,
@@ -254,18 +254,7 @@ defmodule ExTypesense.Collection do
       %ExTypesense.Collection{
         created_at: 1234567890,
         name: companies,
-        default_sorting_field: "company_id",
-        fields: [...],
-        num_documents: 0,
-        symbols_to_index: [],
-        token_separators: []
-      }
-
-      iex> ExTypesense.update_collection_fields(Company, fields)
-      %ExTypesense.Collection{
-        created_at: 1234567890,
-        name: companies,
-        default_sorting_field: "company_id",
+        default_sorting_field: "companies_id",
         fields: [...],
         num_documents: 0,
         symbols_to_index: [],
@@ -304,7 +293,8 @@ defmodule ExTypesense.Collection do
   @doc """
   Permanently drops a collection by collection name or module name.
 
-  **Note**: dropping a collection does not remove the referenced alias, only the indexed documents.
+  **Note**: dropping a collection does not remove the referenced
+  alias, only the indexed documents.
   """
   @doc since: "0.1.0"
   @spec drop_collection(Connection.t(), name :: String.t() | module()) :: response()
diff --git a/lib/ex_typesense/document.ex b/lib/ex_typesense/document.ex
index 7d89b33..a4d520e 100644
--- a/lib/ex_typesense/document.ex
+++ b/lib/ex_typesense/document.ex
@@ -235,7 +235,7 @@ defmodule ExTypesense.Document do
       ...>  %{
       ...>    id: "34",
       ...>    collection_name: "posts",
-      ...>    post_id: 34,
+      ...>    posts_id: 34,
       ...>    title: "the quick brown fox",
       ...>    description: "jumps over the lazy dog"
       ...>  }
@@ -244,7 +244,7 @@ defmodule ExTypesense.Document do
         %{
           "id" => "34",
           "collection_name" => "posts",
-          "post_id" => 34,
+          "posts_id" => 34,
           "title" => "the quick brown fox",
           "description" => "jumps over the lazy dog"
         }
@@ -284,7 +284,7 @@ defmodule ExTypesense.Document do
       ...>  %{
       ...>    id: "94",
       ...>    collection_name: "posts",
-      ...>    post_id: 94,
+      ...>    posts_id: 94,
       ...>    title: "the quick brown fox"
       ...>  }
       iex> ExTypesense.create_document(post)
@@ -292,7 +292,7 @@ defmodule ExTypesense.Document do
       ...>  %{
       ...>    id: "94",
       ...>    collection_name: "posts",
-      ...>    post_id: 94,
+      ...>    posts_id: 94,
       ...>    title: "test"
       ...>  }
       iex> ExTypesense.update_document(updated_post)
@@ -300,8 +300,8 @@ defmodule ExTypesense.Document do
         %{
           "id" => "94",
           "collection_name" => "posts",
-          "post_id" => 94,
-          "title" => "test"
+          "posts_id" => 94,
+          "title" => "sample post"
         }
       }
   """
@@ -386,7 +386,7 @@ defmodule ExTypesense.Document do
       {:ok,
         %{
           "id" => "1",
-          "post_id" => 1,
+          "posts_id" => 1,
           "title" => "our first post",
           "collection_name" => "posts"
         }
@@ -403,7 +403,7 @@ defmodule ExTypesense.Document do
       ...>  %{
       ...>    id: "12",
       ...>    collection_name: "posts",
-      ...>    post_id: 22,
+      ...>    posts_id: 22,
       ...>    title: "the quick brown fox"
       ...>  }
       iex> ExTypesense.create_document(post)
@@ -411,7 +411,7 @@ defmodule ExTypesense.Document do
       {:ok,
         %{
           "id" => "12",
-          "post_id" => 22,
+          "posts_id" => 22,
           "title" => "the quick brown fox",
           "collection_name" => "posts"
         }