deuterium 0.0.1 

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

use serialize::json::Json;
use time::Timespec;
use uuid::Uuid;

use sql::{SqlContext, ToSql};


use expression::{RawExpr};
use field::{
    NamedField,
};

#[cfg(feature = "postgres")]
use postgres;

pub trait ToPredicateValue {
    fn to_predicate_value(&self, ctx: &mut SqlContext) -> String;
}

// Trait to connect Deuterium and rust-postgres
#[cfg(feature = "postgres")]
pub trait AsPostgresValue: postgres::types::ToSql {
    fn as_postgres_value(&self) -> &postgres::types::ToSql {
        self
    }
}

macro_rules! to_predicate_for_field(
    ($f:ty) => (
        impl ToPredicateValue for $f  {
            fn to_predicate_value(&self, ctx: &mut SqlContext) -> String { self.to_sql(ctx) }
        }
    )
)

impl<T: Clone> ToPredicateValue for NamedField<T> {
    fn to_predicate_value(&self, ctx: &mut SqlContext) -> String { self.to_sql(ctx) }
}

macro_rules! raw_value_to_predicate_value(
    ($t:ty) => (
        #[cfg(feature = "postgres")]
        impl AsPostgresValue for $t {}

        impl ToPredicateValue for $t { 
            fn to_predicate_value(&self, ctx: &mut SqlContext) -> String { 
                ctx.hold(box self.clone())
            }
        }
    )
)

raw_value_to_predicate_value!(bool)
raw_value_to_predicate_value!(i8)
raw_value_to_predicate_value!(i16)
raw_value_to_predicate_value!(i32)
raw_value_to_predicate_value!(i64)
raw_value_to_predicate_value!(f32)
raw_value_to_predicate_value!(f64)
raw_value_to_predicate_value!(String)
raw_value_to_predicate_value!(Vec<u8>)
raw_value_to_predicate_value!(Json)
raw_value_to_predicate_value!(Timespec)
raw_value_to_predicate_value!(Uuid)


impl ToPredicateValue for RawExpr { 
    fn to_predicate_value(&self, _ctx: &mut SqlContext) -> String { 
        self.content.to_string()
    }
}

macro_rules! extended_impl(
    ($t:ty) => (
        impl ToSql for $t { fn to_sql(&self, ctx: &mut SqlContext) -> String { self.to_predicate_value(ctx) } }
        impl ToSql for Option<$t> { fn to_sql(&self, ctx: &mut SqlContext) -> String { self.to_predicate_value(ctx) } }

        impl ToPredicateValue for Option<$t> { 
            fn to_predicate_value(&self, ctx: &mut SqlContext) -> String { 
                match self {
                    &Some(ref predicate) => predicate.to_predicate_value(ctx),
                    &None => "NULL".to_string()
                }
            }
        }
    )
)

extended_impl!(bool)
extended_impl!(i8)
extended_impl!(i16)
extended_impl!(i32)
extended_impl!(i64)
extended_impl!(f32)
extended_impl!(f64)
extended_impl!(String)
extended_impl!(Vec<u8>)
extended_impl!(Json)
extended_impl!(Timespec)
extended_impl!(Uuid)


extended_impl!(RawExpr)

impl<T: ToPredicateValue> ToPredicateValue for Vec<T> {
    fn to_predicate_value(&self, ctx: &mut SqlContext) -> String { 
        let values: Vec<String> = self.iter().map(|v| v.to_predicate_value(ctx)).collect();
        values.connect(", ")
    }  
}

impl<T: ToPredicateValue> ToSql for Vec<T> {
    fn to_sql(&self, ctx: &mut SqlContext) -> String { 
        self.to_predicate_value(ctx)
    }  
}