diesel-rs/diesel

"Identifier" column in table macro results in "Missing lifetime specifier"

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#1651 opened on Apr 20, 2018

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 (5 comments) (0 reactions) (0 assignees)Rust (12,054 stars) (1,003 forks)batch import
documentationhelp wanted

Description

I was able to fix this using #[sql_name=“...”] but the error is not clear about what's really going on, and I found sql_name by searching through tickets, not through official documentation.

This seems like the sort of thing someone could get stuck on.

It was Nullable type if relevant.

Contributor guide

Tech stack
rust
Domain
backenddatabase
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
basic Rustunderstanding of macros
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50
Research direction
Investigate the diesel table macro in `diesel/src/table.rs` to understand how column names are parsed and why 'Identifier' triggers a missing lifetime specifier error. Look at the macro expansion to see where the lifetime is expected but not provided. Improve the error message to suggest using `#[sql name="..."]` as a workaround, and consider adding a check for reserved words or invalid identifiers.