diesel-rs/diesel

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

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#1,651 创建于 2018年4月20日

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 (5 评论) (0 反应) (0 负责人)Rust (12,054 star) (1,003 fork)batch import
documentationhelp wanted

描述

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.

贡献者指南

技术栈
rust
领域
backenddatabase
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-3 hours
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
mostly clear
前置要求
basic Rustunderstanding of macros
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
50
研究方向
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.