ekodb_client 0.15.1

Official Rust client library for ekoDB - A high-performance database
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

//! Join support for multi-collection queries
//!
//! This module provides support for joining data across multiple collections,
//! similar to SQL joins but with document-oriented semantics.

use serde::{Deserialize, Serialize};

/// Configuration for joining collections
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct JoinConfig {
    /// Target collections to join with
    pub collections: Vec<String>,

    /// Field in the current collection
    pub local_field: String,

    /// Field in the target collection(s)
    pub foreign_field: String,

    /// Name of the field to store joined data
    pub as_field: String,
}

impl JoinConfig {
    /// Create a new join configuration
    pub fn new(
        collections: Vec<String>,
        local_field: impl Into<String>,
        foreign_field: impl Into<String>,
        as_field: impl Into<String>,
    ) -> Self {
        Self {
            collections,
            local_field: local_field.into(),
            foreign_field: foreign_field.into(),
            as_field: as_field.into(),
        }
    }

    /// Create a join with a single collection
    pub fn single(
        collection: impl Into<String>,
        local_field: impl Into<String>,
        foreign_field: impl Into<String>,
        as_field: impl Into<String>,
    ) -> Self {
        Self::new(
            vec![collection.into()],
            local_field,
            foreign_field,
            as_field,
        )
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_join_config_new() {
        let join = JoinConfig::new(
            vec!["orders".to_string(), "products".to_string()],
            "user_id",
            "id",
            "user_data",
        );

        assert_eq!(join.collections.len(), 2);
        assert_eq!(join.collections[0], "orders");
        assert_eq!(join.collections[1], "products");
        assert_eq!(join.local_field, "user_id");
        assert_eq!(join.foreign_field, "id");
        assert_eq!(join.as_field, "user_data");
    }

    #[test]
    fn test_join_config_single() {
        let join = JoinConfig::single("users", "user_id", "id", "user");

        assert_eq!(join.collections.len(), 1);
        assert_eq!(join.collections[0], "users");
        assert_eq!(join.local_field, "user_id");
        assert_eq!(join.foreign_field, "id");
        assert_eq!(join.as_field, "user");
    }

    #[test]
    fn test_join_config_serialization() {
        let join = JoinConfig::single("users", "user_id", "id", "user");

        let json = serde_json::to_value(&join).unwrap();
        assert_eq!(json["collections"][0], "users");
        assert_eq!(json["local_field"], "user_id");
        assert_eq!(json["foreign_field"], "id");
        assert_eq!(json["as_field"], "user");
    }

    #[test]
    fn test_join_config_deserialization() {
        let json = serde_json::json!({
            "collections": ["users"],
            "local_field": "user_id",
            "foreign_field": "id",
            "as_field": "user"
        });

        let join: JoinConfig = serde_json::from_value(json).unwrap();
        assert_eq!(join.collections.len(), 1);
        assert_eq!(join.collections[0], "users");
        assert_eq!(join.local_field, "user_id");
        assert_eq!(join.foreign_field, "id");
        assert_eq!(join.as_field, "user");
    }

    #[test]
    fn test_multi_collection_join() {
        let join = JoinConfig::new(
            vec![
                "users".to_string(),
                "profiles".to_string(),
                "settings".to_string(),
            ],
            "user_id",
            "id",
            "user_info",
        );

        assert_eq!(join.collections.len(), 3);
        assert!(join.collections.contains(&"users".to_string()));
        assert!(join.collections.contains(&"profiles".to_string()));
        assert!(join.collections.contains(&"settings".to_string()));
    }
}