diff --git a/ARCHITECTURE.md b/ARCHITECTURE.md
index 674b3163..09cd26a2 100644
--- a/ARCHITECTURE.md
+++ b/ARCHITECTURE.md
@@ -1,5 +1,7 @@
 # Architecture
 
+> Let's dive under the Sea 🤿
+
 To understand the architecture of SeaORM, let's discuss what is an ORM. ORM exists to provide abstractions over common operations you would do against a database and hide the implementation details like the actual SQL queries.
 
 With a good ORM, you shouldn't bother to look under the API surface. Until you do. I hear you say *'abstraction leaks'*, and yes, it does.
diff --git a/README.md b/README.md
index 1c0e83d1..2285c77c 100644
--- a/README.md
+++ b/README.md
@@ -239,7 +239,7 @@ fruit::Entity::delete_many()
 
 1. [Design](https://github.com/SeaQL/sea-orm/tree/master/DESIGN.md)
 1. [Architecture](https://github.com/SeaQL/sea-orm/tree/master/ARCHITECTURE.md)
-1. [Compare with Diesel](https://www.sea-ql.org/SeaORM/docs/internal-design/diesel)
+1. [Change Log](https://github.com/SeaQL/sea-orm/tree/master/CHANGELOG.md)
 
 ## License
 
diff --git a/src/lib.rs b/src/lib.rs
index 7ffbbf9b..a1dc83f7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -335,7 +335,7 @@
 //!
 //! 1. [Design](https://github.com/SeaQL/sea-orm/tree/master/DESIGN.md)
 //! 1. [Architecture](https://github.com/SeaQL/sea-orm/tree/master/ARCHITECTURE.md)
-//! 1. [Compare with Diesel](https://www.sea-ql.org/SeaORM/docs/internal-design/diesel)
+//! 1. [Change Log](https://github.com/SeaQL/sea-orm/tree/master/CHANGELOG.md)
 //!
 //! ## License
 //!
diff --git a/src/query/helper.rs b/src/query/helper.rs
index e6df3637..43fed28a 100644
--- a/src/query/helper.rs
+++ b/src/query/helper.rs
@@ -269,6 +269,48 @@ pub trait QueryFilter: Sized {
     ///     "SELECT `cake`.`id`, `cake`.`name` FROM `cake` WHERE `cake`.`id` = 4 OR `cake`.`id` = 5"
     /// );
     /// ```
+    ///
+    /// Add a runtime-built condition tree.
+    /// ```
+    /// use sea_orm::{entity::*, query::*, tests_cfg::cake, DbBackend};
+    /// struct Input {
+    ///     name: Option<String>,
+    /// }
+    /// let input = Input { name: Some("cheese".to_owned()) };
+    ///
+    /// let mut conditions = Condition::all();
+    /// if let Some(name) = input.name {
+    ///     conditions = conditions.add(cake::Column::Name.contains(&name));
+    /// }
+    ///
+    /// assert_eq!(
+    ///     cake::Entity::find()
+    ///         .filter(conditions)
+    ///         .build(DbBackend::MySql)
+    ///         .to_string(),
+    ///     "SELECT `cake`.`id`, `cake`.`name` FROM `cake` WHERE `cake`.`name` LIKE '%cheese%'"
+    /// );
+    /// ```
+    ///
+    /// Add a runtime-built condition tree, functional-way.
+    /// ```
+    /// use sea_orm::{entity::*, query::*, tests_cfg::cake, DbBackend};
+    /// struct Input {
+    ///     name: Option<String>,
+    /// }
+    /// let input = Input { name: Some("cheese".to_owned()) };
+    ///
+    /// assert_eq!(
+    ///     cake::Entity::find()
+    ///         .filter(
+    ///             Condition::all()
+    ///                 .add_option(input.name.map(|n| cake::Column::Name.contains(&n)))
+    ///         )
+    ///         .build(DbBackend::MySql)
+    ///         .to_string(),
+    ///     "SELECT `cake`.`id`, `cake`.`name` FROM `cake` WHERE `cake`.`name` LIKE '%cheese%'"
+    /// );
+    /// ```
     fn filter<F>(mut self, filter: F) -> Self
     where
         F: IntoCondition,