diesel: names from parent modules are not accessible without an explicit import

Setup

Versions

• Rust:1.29.0-nightly (254f8796b 2018-07-13)
• Diesel:1.3.2
• Database:sqlite
• Operating System:win10

Feature Flags

• diesel:

Problem Description

I got a lot of warns after rustup and cargo update, like follow:

warning: cannot find type `ThingDefine` in this scope
  --> src\data\thing\mod.rs:71:41
   |
71 | #[derive(Serialize, Deserialize, Debug, Queryable, Clone, PartialOrd, PartialEq)]
   |                                         ^^^^^^^^^ names from parent modules are not accessible without an explicit import
   |
   = note: #[warn(proc_macro_derive_resolution_fallback)] on by default
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #50504 <https://github.com/rust-lang/rust/issues/50504>

warning: cannot find type `NaiveDateTime` in this scope
  --> src\data\thing\mod.rs:71:41
   |
71 | #[derive(Serialize, Deserialize, Debug, Queryable, Clone, PartialOrd, PartialEq)]
   |                                         ^^^^^^^^^ names from parent modules are not accessible without an explicit import
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #50504 <https://github.com/rust-lang/rust/issues/50504>

What are you trying to accomplish?

I try to add #[allow(proc_macro_derive_resolution_fallback)] on the structure used for query to disable the errors, but the warning exists yet.

What is the expected output?

I want to remove these warnings