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

use crate::types::*;

/// Specification of a table index
#[derive(Debug, Clone)]
pub struct TableIndex {
    pub(crate) name: Option<String>,
    pub(crate) columns: Vec<IndexColumn>,
}

#[derive(Debug, Clone)]
pub struct IndexColumn {
    pub(crate) name: DynIden,
    pub(crate) prefix: Option<u32>,
    pub(crate) order: Option<IndexOrder>,
}

#[derive(Debug, Clone)]
pub enum IndexOrder {
    Asc,
    Desc,
}

pub trait IntoIndexColumn {
    fn into_index_column(self) -> IndexColumn;
}

impl Default for TableIndex {
    fn default() -> Self {
        Self::new()
    }
}

impl<I> IntoIndexColumn for I
where
    I: IntoIden,
{
    fn into_index_column(self) -> IndexColumn {
        IndexColumn {
            name: self.into_iden(),
            prefix: None,
            order: None,
        }
    }
}

impl<I> IntoIndexColumn for (I, u32)
where
    I: IntoIden,
{
    fn into_index_column(self) -> IndexColumn {
        IndexColumn {
            name: self.0.into_iden(),
            prefix: Some(self.1),
            order: None,
        }
    }
}

impl<I> IntoIndexColumn for (I, IndexOrder)
where
    I: IntoIden,
{
    fn into_index_column(self) -> IndexColumn {
        IndexColumn {
            name: self.0.into_iden(),
            prefix: None,
            order: Some(self.1),
        }
    }
}

impl<I> IntoIndexColumn for (I, u32, IndexOrder)
where
    I: IntoIden,
{
    fn into_index_column(self) -> IndexColumn {
        IndexColumn {
            name: self.0.into_iden(),
            prefix: Some(self.1),
            order: Some(self.2),
        }
    }
}

impl TableIndex {
    /// Construct a new table index
    pub fn new() -> Self {
        Self {
            name: None,
            columns: Vec::new(),
        }
    }

    /// Set index name
    pub fn name(&mut self, name: &str) -> &mut Self {
        self.name = Some(name.into());
        self
    }

    /// Set index column
    pub fn col(&mut self, col: IndexColumn) -> &mut Self {
        self.columns.push(col);
        self
    }

    pub fn get_column_names(&self) -> Vec<String> {
        self.columns
            .iter()
            .map(|col| col.name.to_string())
            .collect()
    }
}