arel 0.0.12

arel: a sql orm
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147

use std::default::Default;
use serde_json::{Value as Json};
use crate::statements;

pub fn value_sql_string_from_json(json_value: &Json) -> anyhow::Result<String> {
    match json_value {
        Json::Array(json_array) => {
            let mut values = vec![];
            for json_value in json_array.iter() {
                values.push(value_sql_string_from_json(json_value)?);
            }
            Ok(format!("({})", values.join(", ")))
        },
        _ => statements::core_value_sql_string_from_json(json_value)
    }
}

#[derive(Clone, Debug)]
pub struct Sql {
    pub value: String,
    pub prepare_value: Option<Vec<Json>>,
}

impl Default for Sql {
    fn default() -> Self {
        Self {
            value: "".to_string(),
            prepare_value: None,
        }
    }
}

impl Sql {
    pub fn new(value: String) -> Self {
        Self {
            value,
            prepare_value: None,
        }
    }
    pub fn new_with_prepare(value: String, prepare_value: Vec<Json>) -> Self {
        let mut sql = Self::new(value);
        sql.prepare_value = Some(prepare_value);
        sql
    }
    pub fn push(&mut self, char: char) -> &mut Self {
        self.value.push(char);
        self
    }
    pub fn push_str(&mut self, sub_str: &str) -> &mut Self {
        self.value.push_str(sub_str);
        self
    }
    pub fn push_prepare_value(&mut self, sub_prepare_value: &Vec<Json>) -> &mut Self {
        if let Some(prepare_value) = &mut self.prepare_value {
            prepare_value.extend_from_slice(sub_prepare_value);
        } else {
            self.prepare_value = Some(sub_prepare_value.clone());
        }
        self
    }
    pub fn push_str_with_prepare_value(&mut self, sub_str: &str, sub_prepare_value: &Vec<Json>) -> &mut Self {
        self.value.push_str(sub_str);
        self.push_prepare_value(sub_prepare_value);
        self
    }
    pub fn push_from_sql(&mut self, sql: &Sql) -> &mut Self {
        if let Some(prepare_value) = &sql.prepare_value {
            self.push_str_with_prepare_value(&sql.value, prepare_value);
        } else {
            self.push_str(&sql.value);
        }
        self
    }
    pub fn push_from_sqls(&mut self, sqls: &Vec<Sql>, join_str: &str) -> &mut Self {
        let len = sqls.len();
        for (idx, sql) in sqls.iter().enumerate() {
            self.push_from_sql(sql);
            if idx != len - 1 {
                self.push_str(join_str);
            }
        }
        self
    }
    pub fn to_sql_string(&self) -> anyhow::Result<String> {
        if let Some(prepare_value) = &self.prepare_value {
            let mut replace_idx = 0;
            let raw_sql = self.value.chars().map(|char|
                match char {
                    '?' => {
                        let use_replace_value = prepare_value.get(replace_idx).expect("参数不足");
                        replace_idx += 1;
                        value_sql_string_from_json(use_replace_value)
                    },
                    _ => Ok(char.to_string())
                }).collect::<anyhow::Result<String>>()?;
            if replace_idx == prepare_value.len() {
                Ok(raw_sql)
            } else {
                Err(anyhow::anyhow!("prepare sql params count not match: {}", raw_sql))
            }
        } else {
            Ok(self.value.clone())
        }
    }
    #[cfg(any(feature = "sqlite", feature = "mysql", feature = "postgres", feature = "mssql"))]
    pub(crate) async fn fetch_one<'c, E>(&self, executor: E) -> anyhow::Result<sqlx::any::AnyRow>
    where E: sqlx::Executor<'c, Database = sqlx::Any>
    {
        // let db_state = crate::visitors::get_db_state()?;
        let mut query = sqlx::query(&self.value);
        if let Some(prepare_value) = &self.prepare_value {
            for prepare_item in prepare_value.iter() {
                query = query.bind(value_sql_string_from_json(prepare_item)?);
            }
        }
        let row = query.fetch_one(executor).await?;
        Ok(row)
    }
    #[cfg(any(feature = "sqlite", feature = "mysql", feature = "postgres", feature = "mssql"))]
    pub(crate) async fn fetch_all<'c, E>(&self, executor: E) -> anyhow::Result<Vec<sqlx::any::AnyRow>>
        where E: sqlx::Executor<'c, Database = sqlx::Any>
    {
        // let db_state = crate::visitors::get_db_state()?;
        let mut query = sqlx::query(&self.value);
        if let Some(prepare_value) = &self.prepare_value {
            for prepare_item in prepare_value.iter() {
                query = query.bind(value_sql_string_from_json(prepare_item)?);
            }
        }
        let rows = query.fetch_all(executor).await?;
        Ok(rows)
    }
    #[cfg(any(feature = "sqlite", feature = "mysql", feature = "postgres", feature = "mssql"))]
    pub(crate) async fn execute<'c, E>(&self, executor: E) -> anyhow::Result<sqlx::any::AnyQueryResult>
        where E: sqlx::Executor<'c, Database = sqlx::Any>
    {
        // let db_state = crate::visitors::get_db_state()?;
        let mut query = sqlx::query(&self.value);
        if let Some(prepare_value) = &self.prepare_value {
            for prepare_item in prepare_value.iter() {
                query = query.bind(value_sql_string_from_json(prepare_item)?);
            }
        }
        let query_result = query.execute(executor).await?;
        Ok(query_result)
    }
}