drizzle 0.1.5

A type-safe SQL query builder for Rust
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
148
149
150

macro_rules! sqlite_async_prepared_impl {
    ($conn:ty, $row:ty, $params_from_iter:path) => {
        impl<'a> PreparedStatement<'a> {
            /// Runs the prepared statement and returns the number of affected rows
            pub async fn execute(
                &self,
                conn: &$conn,
                params: impl IntoIterator<
                    Item = drizzle_core::param::ParamBind<
                        'a,
                        drizzle_sqlite::values::SQLiteValue<'a>,
                    >,
                >,
            ) -> drizzle_core::error::Result<u64> {
                let (sql_str, params) = self.inner.bind(params);

                conn.execute(sql_str, $params_from_iter(params))
                    .await
                    .map_err(Into::into)
            }

            /// Runs the prepared statement and returns all matching rows
            pub async fn all<T>(
                &self,
                conn: &$conn,
                params: impl IntoIterator<
                    Item = drizzle_core::param::ParamBind<
                        'a,
                        drizzle_sqlite::values::SQLiteValue<'a>,
                    >,
                >,
            ) -> drizzle_core::error::Result<Vec<T>>
            where
                T: for<'r> TryFrom<&'r $row>,
                for<'r> <T as TryFrom<&'r $row>>::Error: Into<drizzle_core::error::DrizzleError>,
            {
                let (sql_str, params) = self.inner.bind(params);

                let mut rows = conn.query(sql_str, $params_from_iter(params)).await?;

                let mut results = Vec::new();
                while let Some(row) = rows.next().await? {
                    let converted = T::try_from(&row).map_err(Into::into)?;
                    results.push(converted);
                }

                Ok(results)
            }

            /// Runs the prepared statement and returns a single row
            pub async fn get<T>(
                &self,
                conn: &$conn,
                params: impl IntoIterator<
                    Item = drizzle_core::param::ParamBind<
                        'a,
                        drizzle_sqlite::values::SQLiteValue<'a>,
                    >,
                >,
            ) -> drizzle_core::error::Result<T>
            where
                T: for<'r> TryFrom<&'r $row>,
                for<'r> <T as TryFrom<&'r $row>>::Error: Into<drizzle_core::error::DrizzleError>,
            {
                let (sql_str, params) = self.inner.bind(params);
                let mut rows = conn.query(sql_str, $params_from_iter(params)).await?;

                if let Some(row) = rows.next().await? {
                    T::try_from(&row).map_err(Into::into)
                } else {
                    Err(drizzle_core::error::DrizzleError::NotFound)
                }
            }
        }

        impl OwnedPreparedStatement {
            /// Runs the prepared statement and returns the number of affected rows
            pub async fn execute<'a>(
                &self,
                conn: &$conn,
                params: impl IntoIterator<
                    Item = drizzle_core::param::ParamBind<
                        'a,
                        drizzle_sqlite::values::SQLiteValue<'a>,
                    >,
                >,
            ) -> drizzle_core::error::Result<u64> {
                let (sql_str, params) = self.inner.bind(params);

                conn.execute(sql_str, $params_from_iter(params))
                    .await
                    .map_err(Into::into)
            }

            /// Runs the prepared statement and returns all matching rows
            pub async fn all<'a, T>(
                &self,
                conn: &$conn,
                params: impl IntoIterator<
                    Item = drizzle_core::param::ParamBind<
                        'a,
                        drizzle_sqlite::values::SQLiteValue<'a>,
                    >,
                >,
            ) -> drizzle_core::error::Result<Vec<T>>
            where
                T: for<'r> TryFrom<&'r $row>,
                for<'r> <T as TryFrom<&'r $row>>::Error: Into<drizzle_core::error::DrizzleError>,
            {
                let (sql_str, params) = self.inner.bind(params);
                let mut rows = conn.query(sql_str, $params_from_iter(params)).await?;

                let mut results = Vec::new();
                while let Some(row) = rows.next().await? {
                    let converted = T::try_from(&row).map_err(Into::into)?;
                    results.push(converted);
                }

                Ok(results)
            }

            /// Runs the prepared statement and returns a single row
            pub async fn get<'a, T>(
                &self,
                conn: &$conn,
                params: impl IntoIterator<
                    Item = drizzle_core::param::ParamBind<
                        'a,
                        drizzle_sqlite::values::SQLiteValue<'a>,
                    >,
                >,
            ) -> drizzle_core::error::Result<T>
            where
                T: for<'r> TryFrom<&'r $row>,
                for<'r> <T as TryFrom<&'r $row>>::Error: Into<drizzle_core::error::DrizzleError>,
            {
                let (sql_str, params) = self.inner.bind(params);
                let mut rows = conn.query(sql_str, $params_from_iter(params)).await?;

                if let Some(row) = rows.next().await? {
                    T::try_from(&row).map_err(Into::into)
                } else {
                    Err(drizzle_core::error::DrizzleError::NotFound)
                }
            }
        }
    };
}

pub(crate) use sqlite_async_prepared_impl;