105 lines
3.4 KiB
Rust
105 lines
3.4 KiB
Rust
use super::{builder, DatabaseTrait};
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use crate::config;
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use crate::common::error::CustomResult;
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use async_trait::async_trait;
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use serde_json::Value;
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use sqlx::{Column, Executor, PgPool, Row, TypeInfo};
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use std::collections::HashMap;
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use std::{env, fs};
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#[derive(Clone)]
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pub struct Postgresql {
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pool: PgPool,
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}
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#[async_trait]
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impl DatabaseTrait for Postgresql {
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async fn initialization(db_config: config::SqlConfig) -> CustomResult<()> {
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let path = env::current_dir()?
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.join("src")
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.join("storage")
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.join("sql")
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.join("postgresql")
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.join("schema.sql");
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let grammar = fs::read_to_string(&path)?;
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let connection_str = format!(
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"postgres://{}:{}@{}:{}",
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db_config.user, db_config.password, db_config.address, db_config.port
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);
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let pool = PgPool::connect(&connection_str).await?;
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pool.execute(format!("CREATE DATABASE {}", db_config.db_name).as_str())
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.await?;
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let new_connection_str = format!(
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"postgres://{}:{}@{}:{}/{}",
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db_config.user,
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db_config.password,
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db_config.address,
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db_config.port,
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db_config.db_name
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);
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let new_pool = PgPool::connect(&new_connection_str).await?;
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new_pool.execute(grammar.as_str()).await?;
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Ok(())
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}
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async fn connect(db_config: &config::SqlConfig) -> CustomResult<Self> {
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let connection_str = format!(
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"postgres://{}:{}@{}:{}/{}",
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db_config.user,
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db_config.password,
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db_config.address,
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db_config.port,
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db_config.db_name
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);
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let pool = PgPool::connect(&connection_str).await?;
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Ok(Postgresql { pool })
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}
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async fn execute_query<'a>(
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&'a self,
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builder: &builder::QueryBuilder,
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) -> CustomResult<Vec<HashMap<String, Value>>> {
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let (query, values) = builder.build()?;
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let mut sqlx_query = sqlx::query(&query);
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for value in values {
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sqlx_query = sqlx_query.bind(value.to_sql_string()?);
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}
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let rows = sqlx_query.fetch_all(&self.pool).await?;
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Ok(rows
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.into_iter()
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.map(|row| {
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row.columns()
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.iter()
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.map(|col| {
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let value = match col.type_info().name() {
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"INT4" | "INT8" => Value::Number(
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row.try_get::<i64, _>(col.name()).unwrap_or_default().into(),
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),
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"FLOAT4" | "FLOAT8" => Value::Number(
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serde_json::Number::from_f64(
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row.try_get::<f64, _>(col.name()).unwrap_or(0.0),
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)
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.unwrap_or_else(|| 0.into()),
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),
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"BOOL" => Value::Bool(row.try_get(col.name()).unwrap_or_default()),
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"JSON" | "JSONB" => row.try_get(col.name()).unwrap_or(Value::Null),
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_ => Value::String(row.try_get(col.name()).unwrap_or_default()),
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};
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(col.name().to_string(), value)
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})
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.collect()
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})
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.collect())
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}
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}
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