diesel Diesel 动态添加 filter 使用 into_boxed e.g. let mut qs = files_dsl::files .offset(offset) .limit(limit) .order(ordering.order()) .select(File::as_select()).into_boxed(); if and_tags.len() > 0 { qs = qs.filter(files:
diesel Diesel Postgres array string 筛选 实现 array string (e.g. tags) 的方案如下: * 或逻辑,即只要有一个 tag 符合即可,使用:overlaps_with,如:files::tags.overlaps_with(tags.clone()) * 与逻辑,即需要数据拥有全部的 tags, 使用: contains * 非逻辑,即排除某些 tag,使用 overlaps_with(tags.
rust Actix-web + diesel 实现 MySQL 数据库连接池 首先,需要给 diesel 添加 c2d2 feature: diesel = { version = "2.1.0", features = ["mysql", "r2d2"] } 然后创建 AppState 结构体: use diesel::{MysqlConnection, r2d2::{Pool, ConnectionManager}}; #[derive(Clone)] pub struct AppState { pub pool: Pool
rust diesel cannot infer type of the type parameter `U` declared on the method Use load:: to specify the type. fn count_packages() -> i64 { let conn = &mut establish_connection("mysql://root:cpchain@127.0.0.1:3306/cpchain"); let found = packages.filter(name.eq("name")).filter(