rusqlite first example does not compile

[jlpoolen]

jlpoole@ryzdesk ~/adsb/tests/rust $ cargo new rusqlite1 --bin
     Created binary (application) `rusqlite1` package
jlpoole@ryzdesk ~/adsb/tests/rust $ cd rusqlite1/
jlpoole@ryzdesk ~/adsb/tests/rust/rusqlite1 $ cargo add rusqlite
    Updating crates.io index
      Adding rusqlite v0.30.0 to dependencies.
             Features:
             - array
             - backup
             - blob
             - buildtime_bindgen
             - bundled
             - bundled-full
             - bundled-sqlcipher
             - bundled-sqlcipher-vendored-openssl
             - bundled-windows
             - chrono
             - collation
             - column_decltype
             - csv
             - csvtab
             - extra_check
             - functions
             - hooks
             - i128_blob
             - in_gecko
             - limits
             - load_extension
             - loadable_extension
             - modern-full
             - modern_sqlite
             - release_memory
             - rusqlite-macros
             - serde_json
             - serialize
             - series
             - session
             - sqlcipher
             - time
             - trace
             - unlock_notify
             - url
             - uuid
             - vtab
             - wasm32-wasi-vfs
             - window
             - winsqlite3
             - with-asan
    Updating crates.io index
jlpoole@ryzdesk ~/adsb/tests/rust/rusqlite1 $ cat -n src/main.rs
     1  //
     2  // ref: https://rust-lang-nursery.github.io/rust-cookbook/database/sqlite.html
     3  //
     4  // cargo add rusqlite
     5  //
     6  use rusqlite::{Connection, Result};
     7  use rusqlite::NO_PARAMS;
     8
     9  fn main() -> Result<()> {
    10      let conn = Connection::open("cats.db")?;
    11
    12      conn.execute(
    13          "create table if not exists cat_colors (
    14               id integer primary key,
    15               name text not null unique
    16           )",
    17          NO_PARAMS,
    18      )?;
    19      conn.execute(
    20          "create table if not exists cats (
    21               id integer primary key,
    22               name text not null,
    23               color_id integer not null references cat_colors(id)
    24           )",
    25          NO_PARAMS,
    26      )?;
    27
    28      Ok(())
    29  }
jlpoole@ryzdesk ~/adsb/tests/rust/rusqlite1 $ date; cargo run
Tue Jan  2 05:35:08 PM PST 2024
   Compiling rusqlite1 v0.1.0 (/home/jlpoole/adsb/tests/rust/rusqlite1)
error[E0432]: unresolved import `rusqlite::NO_PARAMS`
 --> src/main.rs:7:5
  |
7 | use rusqlite::NO_PARAMS;
  |     ^^^^^^^^^^^^^^^^^^^ no `NO_PARAMS` in the root

For more information about this error, try `rustc --explain E0432`.
error: could not compile `rusqlite1` (bin "rusqlite1") due to previous error
jlpoole@ryzdesk ~/adsb/tests/rust/rusqlite1 $ 

[jlpoolen]

Here's the diff of the modified example so that it works. There are 2 modifications and 1 deletion.

jlpoole@ryzdesk ~/adsb/tests/rust/rusqlite1 $ diff src/original_main.rs src/main.rs
7c7
< use rusqlite::NO_PARAMS;
---
> //use rusqlite::NO_PARAMS;
17c17
<         NO_PARAMS,
---
>         (),
25c25
<         NO_PARAMS,
---
>         (),
jlpoole@ryzdesk ~/adsb/tests/rust/rusqlite1 $ date; cargo run
Tue Jan  2 05:44:52 PM PST 2024
    Finished dev [unoptimized + debuginfo] target(s) in 0.01s
     Running `target/debug/rusqlite1`
jlpoole@ryzdesk ~/adsb/tests/rust/rusqlite1 $ 

[jlpoolen]

Likewise, the 2nd example suffers from the illegal NO_PARAMS variable. I replaced NO_PARAMS with "()" and now the example with the 2nd code added works.

Tue Jan  2 05:55:26 PM PST 2024
   Compiling rusqlite1 v0.1.0 (/home/jlpoole/adsb/tests/rust/rusqlite1)
error[E0425]: cannot find value `NO_PARAMS` in this scope
  --> src/main.rs:59:31
   |
59 |     let cats = stmt.query_map(NO_PARAMS, |row| {
   |                               ^^^^^^^^^ not found in this scope

For more information about this error, try `rustc --explain E0425`.
error: could not compile `rusqlite1` (bin "rusqlite1") due to previous error
jlpoole@ryzdesk ~/adsb/tests/rust/rusqlite1 $ sed -i s/NO_PARAMS/\(\)/ src/main.rs
jlpoole@ryzdesk ~/adsb/tests/rust/rusqlite1 $ cat src/main.rs |grep NO_PARAMS
jlpoole@ryzdesk ~/adsb/tests/rust/rusqlite1 $ date;cargo run
Tue Jan  2 05:56:59 PM PST 2024
   Compiling rusqlite1 v0.1.0 (/home/jlpoole/adsb/tests/rust/rusqlite1)
warning: fields `name` and `color` are never read
  --> src/main.rs:12:5
   |
11 | struct Cat {
   |        --- fields in this struct
12 |     name: String,
   |     ^^^^
13 |     color: String,
   |     ^^^^^
   |
   = note: `Cat` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
   = note: `#[warn(dead_code)]` on by default

warning: `rusqlite1` (bin "rusqlite1") generated 1 warning
    Finished dev [unoptimized + debuginfo] target(s) in 0.32s
     Running `target/debug/rusqlite1`
Error: SqliteFailure(Error { code: ConstraintViolation, extended_code: 2067 }, Some("UNIQUE constraint failed: cat_colors.name"))
jlpoole@ryzdesk ~/adsb/tests/rust/rusqlite1 $ rm cats.db 
jlpoole@ryzdesk ~/adsb/tests/rust/rusqlite1 $ date;cargo run
Tue Jan  2 05:57:17 PM PST 2024
warning: fields `name` and `color` are never read
  --> src/main.rs:12:5
   |
11 | struct Cat {
   |        --- fields in this struct
12 |     name: String,
   |     ^^^^
13 |     color: String,
   |     ^^^^^
   |
   = note: `Cat` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
   = note: `#[warn(dead_code)]` on by default

warning: `rusqlite1` (bin "rusqlite1") generated 1 warning
    Finished dev [unoptimized + debuginfo] target(s) in 0.01s
     Running `target/debug/rusqlite1`
Found cat Ok(Cat { name: "Oreo", color: "Black" })
Found cat Ok(Cat { name: "Biscuit", color: "Black" })
Found cat Ok(Cat { name: "Tigger", color: "Blue" })
Found cat Ok(Cat { name: "Sammy", color: "Blue" })
jlpoole@ryzdesk ~/adsb/tests/rust/rusqlite1 $ 

[AndyGauge]

Thanks for the report, when I ran it the library used () for no array which I like better.

[AndyGauge]

#708