work with Polars ?

[yingweixiang]

Thank you for your beautiful charts!

Does leptos-chartistry support Polars? I mean using Polars to read .csv file, then do data cleaning & transforming, then use polars_rows_iter to create a Vec, then create a Signal<Vec> to load data and create charts.

I used R/shiny in the past, but it would be cool to do the same thing in rust.

Thanks,
Yingwei

[feral-dot-io]

Hello Yingwei,

Yes, what you've described should work as the glue here is getting the data into Leptos. Once you have the Signal<Vec<f64>> (the f64 is important), the charts can be built like any other.

I'm not familiar with Polars but now I'm thinking maybe I should be.

[yingweixiang]

Thanks, I'll try to play with that Signal<Vec>. Yingwei

[yingweixiang]

one more question:
it seems that the x values should be f64, it can not be categorical data, like strings.
I changed the x of sample Mydata to String type, it won't work, saying String type doesn't implement trait Tick.

so, all x and y values should all be f64 type, right ?

Thanks,
Yingwei

[feral-dot-io]

Yes that's right. The Tick trait currently only implements for f64 and Chrono's DateTime. You can see all the implementations here: https://docs.rs/leptos-chartistry/0.2.1/leptos_chartistry/trait.Tick.html#foreign-impls

It's a sealed trait and categorical / strings would need a whole bunch of work not yet done.

[yingweixiang]

I can run your sample SSR app in my local host. However, after "cargo add polars", (polars = "0.45.1" in Cargo.toml), I can't run your sample SSR app. Then I tried a simple leptos sample app from the leptos book. After adding polars, it didn't work either.
I only add polars = "0.45.1" in Cargo.toml, nothing else.

there are 5 errors, all related to crossterm-0.28.1.

I guess that I need to ask questions in Leptos forum.

[feral-dot-io]

Can you share the full set of errors?

[yingweixiang]

Please see info below.

Compiling psm v0.1.24
Compiling stacker v0.1.17
Compiling bytemuck v1.21.0
Compiling polars-error v0.45.1
Compiling chrono-tz v0.10.0
Compiling memmap2 v0.9.5
Compiling hydration_context v0.2.1
Compiling strum_macros v0.26.4
Compiling target-features v0.1.6
Compiling polars-schema v0.45.1
Compiling multiversion-macros v0.7.4
Compiling serde_json v1.0.127
warning: psm@0.1.24: Compiler family detection failed due to error: ToolNotFound: Failed to find tool. Is clang installed? (see https://docs.rs/cc/latest/cc/#compile-time-requirements for help)
warning: psm@0.1.24: Compiler family detection failed due to error: ToolNotFound: Failed to find tool. Is clang installed? (see https://docs.rs/cc/latest/cc/#compile-time-requirements for help)
error: failed to run custom build command for psm v0.1.24

Caused by:
process didn't exit successfully: D:\webleptos\chartistry_ssr\target\front\debug\build\psm-29dd8ed71a3098e5\build-script-build (exit code: 1)
--- stdout
OPT_LEVEL = Some(0)
OUT_DIR = Some(D:\webleptos\chartistry_ssr\target\front\wasm32-unknown-unknown\debug\build\psm-05f07a1d9aed3cb0\out)
TARGET = Some(wasm32-unknown-unknown)
HOST = Some(x86_64-pc-windows-msvc)
cargo:rerun-if-env-changed=CC_wasm32-unknown-unknown
CC_wasm32-unknown-unknown = None
cargo:rerun-if-env-changed=CC_wasm32_unknown_unknown
CC_wasm32_unknown_unknown = None
cargo:rerun-if-env-changed=TARGET_CC
TARGET_CC = None
cargo:rerun-if-env-changed=CC
CC = None
cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
cargo:warning=Compiler family detection failed due to error: ToolNotFound: Failed to find tool. Is clang installed? (see https://docs.rs/cc/latest/cc/#compile-time-requirements for help)
RUSTC_WRAPPER = None
cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
CRATE_CC_NO_DEFAULTS = None
DEBUG = Some(true)
cargo:rerun-if-env-changed=CFLAGS_wasm32-unknown-unknown
CFLAGS_wasm32-unknown-unknown = None
cargo:rerun-if-env-changed=CFLAGS_wasm32_unknown_unknown
CFLAGS_wasm32_unknown_unknown = None
cargo:rerun-if-env-changed=TARGET_CFLAGS
TARGET_CFLAGS = None
cargo:rerun-if-env-changed=CFLAGS
CFLAGS = None
CARGO_ENCODED_RUSTFLAGS = Some()
cargo:rustc-check-cfg=cfg(switchable_stack,asm,link_asm)
cargo:rustc-cfg=asm
cargo:rustc-cfg=link_asm
cargo:rustc-cfg=switchable_stack
cargo:rerun-if-env-changed=AR_wasm32-unknown-unknown
AR_wasm32-unknown-unknown = None
cargo:rerun-if-env-changed=AR_wasm32_unknown_unknown
AR_wasm32_unknown_unknown = None
cargo:rerun-if-env-changed=TARGET_AR
TARGET_AR = None
cargo:rerun-if-env-changed=AR
AR = None
cargo:warning=Compiler family detection failed due to error: ToolNotFound: Failed to find tool. Is clang installed? (see https://docs.rs/cc/latest/cc/#compile-time-requirements for help)
cargo:rerun-if-env-changed=CROSS_COMPILE
CROSS_COMPILE = None
RUSTC_LINKER = None
cargo:rerun-if-env-changed=ARFLAGS_wasm32-unknown-unknown
ARFLAGS_wasm32-unknown-unknown = None
cargo:rerun-if-env-changed=ARFLAGS_wasm32_unknown_unknown
ARFLAGS_wasm32_unknown_unknown = None
cargo:rerun-if-env-changed=TARGET_ARFLAGS
TARGET_ARFLAGS = None
cargo:rerun-if-env-changed=ARFLAGS
ARFLAGS = None

--- stderr

error occurred in cc-rs: Failed to find tool. Is ar installed? (see https://docs.rs/cc/latest/cc/#compile-time-requirements for help)

warning: build failed, waiting for other jobs to finish...

[yingweixiang]

above info is when compiling leptos-chartistry SSR sample.

when compiling basic Leptos sample from leptos book, it says:

error[E0425]: cannot find function enable_raw_mode in module sys
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal.rs:123:10
|
123 | sys::enable_raw_mode()
| ^^^^^^^^^^^^^^^ not found in sys
|
note: found an item that was configured out
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:8:23
|
8 | disable_raw_mode, enable_raw_mode, is_raw_mode_enabled, size, window_size,
| ^^^^^^^^^^^^^^^
note: the item is gated here
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:6:1
|
6 | #[cfg(unix)]
| ^^^^^^^^^^^^
note: found an item that was configured out
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:17:30
|
17 | clear, disable_raw_mode, enable_raw_mode, is_raw_mode_enabled, scroll_down, scroll_up,
| ^^^^^^^^^^^^^^^
note: the item is gated here
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:15:1
|
15 | #[cfg(windows)]
| ^^^^^^^^^^^^^^^

error[E0425]: cannot find function disable_raw_mode in module sys
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal.rs:130:10
|
130 | sys::disable_raw_mode()
| ^^^^^^^^^^^^^^^^ not found in sys
|
note: found an item that was configured out
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:8:5
|
8 | disable_raw_mode, enable_raw_mode, is_raw_mode_enabled, size, window_size,
| ^^^^^^^^^^^^^^^^
note: the item is gated here
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:6:1
|
6 | #[cfg(unix)]
| ^^^^^^^^^^^^
note: found an item that was configured out
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:17:12
|
17 | clear, disable_raw_mode, enable_raw_mode, is_raw_mode_enabled, scroll_down, scroll_up,
| ^^^^^^^^^^^^^^^^
note: the item is gated here
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:15:1
|
15 | #[cfg(windows)]
| ^^^^^^^^^^^^^^^

error[E0425]: cannot find function size in module sys
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal.rs:137:10
|
137 | sys::size()
| ^^^^ not found in sys
|
note: found an item that was configured out
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:8:61
|
8 | disable_raw_mode, enable_raw_mode, is_raw_mode_enabled, size, window_size,
| ^^^^
note: the item is gated here
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:6:1
|
6 | #[cfg(unix)]
| ^^^^^^^^^^^^
note: found an item that was configured out
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:18:33
|
18 | set_size, set_window_title, size, window_size,
| ^^^^
note: the item is gated here
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:15:1
|
15 | #[cfg(windows)]
| ^^^^^^^^^^^^^^^

error[E0425]: cannot find function window_size in module sys
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal.rs:154:10
|
154 | sys::window_size()
| ^^^^^^^^^^^ not found in sys
|
note: found an item that was configured out
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:8:67
|
8 | disable_raw_mode, enable_raw_mode, is_raw_mode_enabled, size, window_size,
| ^^^^^^^^^^^
note: the item is gated here
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:6:1
|
6 | #[cfg(unix)]
| ^^^^^^^^^^^^
note: found an item that was configured out
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:18:39
|
18 | set_size, set_window_title, size, window_size,
| ^^^^^^^^^^^
note: the item is gated here
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal\sys.rs:15:1
|
15 | #[cfg(windows)]
| ^^^^^^^^^^^^^^^

Compiling psm v0.1.24
Compiling stacker v0.1.17
error[E0308]: mismatched types
--> C:\Users\yingw.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossterm-0.28.1\src\terminal.rs:107:33
|
107 | pub fn is_raw_mode_enabled() -> io::Result {
| ------------------- ^^^^^^^^^^^^^^^^ expected Result<bool, Error>, found ()
| |
| implicitly returns () as its body has no tail or return expression
|
= note: expected enum Result<bool, std::io::Error>
found unit type ()

Compiling polars-ops v0.45.1
Some errors have detailed explanations: E0308, E0425.
For more information about an error, try rustc --explain E0308.
Compiling argminmax v0.6.2
error: could not compile crossterm (lib) due to 5 previous errors
warning: build failed, waiting for other jobs to finish...

[feral-dot-io]

Are you accidentally or unintentionally compiling Polars to wasm?

If so, try compiling it only when building SSR. See in the SSR Cargo.toml there are dependencies listed like tokio = { version = "1.42", features = [ "full" ], optional = true } The "optional = true" means they don't get compiled unless enabled by a feature. You can see it activated in the ssr feature:

leptos-chartistry/examples/ssr/Cargo.toml

Line 34 in 88a04ef

"dep:tokio",

The other thing to check would be that you have clang installed. If polars works in another project then it's probably set up correctly.