sea_orm_migration/
manager.rs

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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
use super::{IntoSchemaManagerConnection, SchemaManagerConnection};
use sea_orm::sea_query::{
    extension::postgres::{TypeAlterStatement, TypeCreateStatement, TypeDropStatement},
    ForeignKeyCreateStatement, ForeignKeyDropStatement, IndexCreateStatement, IndexDropStatement,
    TableAlterStatement, TableCreateStatement, TableDropStatement, TableRenameStatement,
    TableTruncateStatement,
};
use sea_orm::{ConnectionTrait, DbBackend, DbErr, StatementBuilder};
use sea_schema::{mysql::MySql, postgres::Postgres, probe::SchemaProbe, sqlite::Sqlite};

/// Helper struct for writing migration scripts in migration file
pub struct SchemaManager<'c> {
    conn: SchemaManagerConnection<'c>,
}

impl<'c> SchemaManager<'c> {
    pub fn new<T>(conn: T) -> Self
    where
        T: IntoSchemaManagerConnection<'c>,
    {
        Self {
            conn: conn.into_schema_manager_connection(),
        }
    }

    pub async fn exec_stmt<S>(&self, stmt: S) -> Result<(), DbErr>
    where
        S: StatementBuilder,
    {
        let builder = self.conn.get_database_backend();
        self.conn.execute(builder.build(&stmt)).await.map(|_| ())
    }

    pub fn get_database_backend(&self) -> DbBackend {
        self.conn.get_database_backend()
    }

    pub fn get_connection(&self) -> &SchemaManagerConnection<'c> {
        &self.conn
    }
}

/// Schema Creation
impl<'c> SchemaManager<'c> {
    pub async fn create_table(&self, stmt: TableCreateStatement) -> Result<(), DbErr> {
        self.exec_stmt(stmt).await
    }

    pub async fn create_index(&self, stmt: IndexCreateStatement) -> Result<(), DbErr> {
        self.exec_stmt(stmt).await
    }

    pub async fn create_foreign_key(&self, stmt: ForeignKeyCreateStatement) -> Result<(), DbErr> {
        self.exec_stmt(stmt).await
    }

    pub async fn create_type(&self, stmt: TypeCreateStatement) -> Result<(), DbErr> {
        self.exec_stmt(stmt).await
    }
}

/// Schema Mutation
impl<'c> SchemaManager<'c> {
    pub async fn alter_table(&self, stmt: TableAlterStatement) -> Result<(), DbErr> {
        self.exec_stmt(stmt).await
    }

    pub async fn drop_table(&self, stmt: TableDropStatement) -> Result<(), DbErr> {
        self.exec_stmt(stmt).await
    }

    pub async fn rename_table(&self, stmt: TableRenameStatement) -> Result<(), DbErr> {
        self.exec_stmt(stmt).await
    }

    pub async fn truncate_table(&self, stmt: TableTruncateStatement) -> Result<(), DbErr> {
        self.exec_stmt(stmt).await
    }

    pub async fn drop_index(&self, stmt: IndexDropStatement) -> Result<(), DbErr> {
        self.exec_stmt(stmt).await
    }

    pub async fn drop_foreign_key(&self, stmt: ForeignKeyDropStatement) -> Result<(), DbErr> {
        self.exec_stmt(stmt).await
    }

    pub async fn alter_type(&self, stmt: TypeAlterStatement) -> Result<(), DbErr> {
        self.exec_stmt(stmt).await
    }

    pub async fn drop_type(&self, stmt: TypeDropStatement) -> Result<(), DbErr> {
        self.exec_stmt(stmt).await
    }
}

/// Schema Inspection.
impl<'c> SchemaManager<'c> {
    pub async fn has_table<T>(&self, table: T) -> Result<bool, DbErr>
    where
        T: AsRef<str>,
    {
        has_table(&self.conn, table).await
    }

    pub async fn has_column<T, C>(&self, table: T, column: C) -> Result<bool, DbErr>
    where
        T: AsRef<str>,
        C: AsRef<str>,
    {
        let stmt = match self.conn.get_database_backend() {
            DbBackend::MySql => MySql.has_column(table, column),
            DbBackend::Postgres => Postgres.has_column(table, column),
            DbBackend::Sqlite => Sqlite.has_column(table, column),
        };

        let builder = self.conn.get_database_backend();
        let res = self
            .conn
            .query_one(builder.build(&stmt))
            .await?
            .ok_or_else(|| DbErr::Custom("Failed to check column exists".to_owned()))?;

        res.try_get("", "has_column")
    }

    pub async fn has_index<T, I>(&self, table: T, index: I) -> Result<bool, DbErr>
    where
        T: AsRef<str>,
        I: AsRef<str>,
    {
        let stmt = match self.conn.get_database_backend() {
            DbBackend::MySql => MySql.has_index(table, index),
            DbBackend::Postgres => Postgres.has_index(table, index),
            DbBackend::Sqlite => Sqlite.has_index(table, index),
        };

        let builder = self.conn.get_database_backend();
        let res = self
            .conn
            .query_one(builder.build(&stmt))
            .await?
            .ok_or_else(|| DbErr::Custom("Failed to check index exists".to_owned()))?;

        res.try_get("", "has_index")
    }
}

pub(crate) async fn has_table<C, T>(conn: &C, table: T) -> Result<bool, DbErr>
where
    C: ConnectionTrait,
    T: AsRef<str>,
{
    let stmt = match conn.get_database_backend() {
        DbBackend::MySql => MySql.has_table(table),
        DbBackend::Postgres => Postgres.has_table(table),
        DbBackend::Sqlite => Sqlite.has_table(table),
    };

    let builder = conn.get_database_backend();
    let res = conn
        .query_one(builder.build(&stmt))
        .await?
        .ok_or_else(|| DbErr::Custom("Failed to check table exists".to_owned()))?;

    res.try_get("", "has_table")
}