diesel | A safe , extensible ORM and Query Builder for Rust | SQL Database library
kandi X-RAY | diesel Summary
kandi X-RAY | diesel Summary
A safe, extensible ORM and Query Builder for Rust.
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diesel Key Features
diesel Examples and Code Snippets
Community Discussions
Trending Discussions on diesel
QUESTION
I want to append the filter in rust diesel diesel = { version = "1.4.7", features = ["postgres","64-column-tables","chrono"] }
and tried to do like this(if this works, I could add the conditional query for the diesel query):
ANSWER
Answered 2022-Mar-19 at 18:33Without more detail information, I guessing you want to do condition query with diesel. For example, if your request contains condition named company
, You can tried to append the filter like this way:
QUESTION
I extracted some information from a HTML table, reorganized the data and tried to output the data to a CSV file. However, I'm seeing a lot of gibberish in the 'price' column of the output CSV (see below). When I check the dataframe contents within Python, I see that the price column seems to have empty spaces/tabs and weird alignments.
Results when I print out the dataframe:
Gibberish in the output CSV:
Attached my code below so you are able to replicate the problem:
...ANSWER
Answered 2022-Mar-09 at 05:38Add this line, after all your existing apply/replace lines. After this, it prints fine. Looks like you have unicode characters, which can be encoded to ascii and ignore errors:
QUESTION
How would you setup the impl functions of FromSql and ToSql for a Postgres Jsonb type, that can be an array of data.
Here's some example array json data.
...ANSWER
Answered 2022-Feb-23 at 15:51So the answer to this is easy.
QUESTION
I'm trying to filter the rows of a dataframe according to whether there is a certain value in one column:
...ANSWER
Answered 2022-Feb-15 at 17:58Your problem seems simple enough to be solved by str.contains.
QUESTION
I have this data frame which I'd like to convert to a dict in python, I have many other categories, but showed just two for simplicity
...ANSWER
Answered 2022-Feb-12 at 21:17You can start by creating a dictionary for each record and then group by category to create the final dictionary format desired.
QUESTION
I have the following df
...ANSWER
Answered 2022-Feb-14 at 10:39You could add the expand
argument to the call to scale_continuous
QUESTION
I have this python dictionary and I want to write this data to an Excel file.
NOTE: there are many categories and each category has many cars (I used 2 categories for simplicity)
...ANSWER
Answered 2022-Feb-13 at 20:17TL;DR - the best solution is in the end.
The most straightforward way would be to go over your data and append rows one by one:
QUESTION
I am now using this command to generate schema in rust diesel:
...ANSWER
Answered 2022-Feb-02 at 18:49You are looking for diesel_cli_ext
First install diesel_cli_ext:
QUESTION
I'm trying to get the diesel crate to work with SQLite but going off the getting started guide, it does not seem to work for sqlite.
The code which does work with postgres but not sqlite
...ANSWER
Answered 2022-Jan-25 at 05:15Using execute
rather than get_results
works for SQLite. This will not return the result of the query though so a second query will have to be run to get the updated values.
QUESTION
#[macro_use]
extern crate diesel;
use diesel::result::Error;
use actix_web::web;
use diesel::{PgConnection, QueryDsl, RunQueryDsl};
use r2d2::{Pool, PooledConnection};
use r2d2_diesel::ConnectionManager;
use schema::tests::dsl::*;
pub mod schema;
pub type MyDBConnectionManager = ConnectionManager;
pub type MyPool = Pool;
pub type MyDBConnection = PooledConnection;
struct S { }
impl S {
async fn download_and_store_object(pool: web::Data) -> Result<(), Error>
{
let conn_ = pool.get().expect("couldn't get db connection from pool");
let conn = &conn_;
let v_data_size: Option = web::block(move || -> Result<_, Error> {
Ok(tests.select(b).get_result::>(&**conn)?)
}).await.unwrap();
Ok(())
}
}
#[actix_web::main]
async fn main() -> std::io::Result<()> {
Ok(())
}
...ANSWER
Answered 2022-Jan-23 at 20:12As said in the comments, Conn
can not be shared between threads, so in this case you would need to move the Pool
handle, and get a connection from within the clusure itself:
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No vulnerabilities reported
Install diesel
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.
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