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use crate::Record; /// Trait for structures that can be stored in Database as a ArangoDB EdgeCollection. /// The trait must be implemented to be used as a edge record in [`DatabaseRecord`]. /// /// # How to use /// /// ## Declaration /// /// A structure deriving from `EdgeRecord` **MUST** contain two string fields: /// * `_from` - The id of the source document /// * `_to` - The id of the target document /// Or the compilation will fail. /// /// On creation or save these two fields must be valid ArangoDB `Object ID` formatted as: /// > `CollectionName/DocumentKey` /// /// (Example: "User/123") /// > /// ## Creation /// /// To create a edge between two existing [`DatabaseRecord`] you can use the following process: /// /// ```rust no_run /// # use aragog::{DatabaseRecord, EdgeRecord, Record, DatabaseConnectionPool}; /// # use serde::{Serialize, Deserialize, de::DeserializeOwned}; /// # /// #[derive(Clone, Record, Serialize, Deserialize)] /// struct Character {} /// /// #[derive(Clone, EdgeRecord, Record, Serialize, Deserialize)] /// struct Edge { /// _from: String, /// _to: String, /// description: String, /// } /// # #[tokio::main] /// # async fn main() { /// # let db_accessor = DatabaseConnectionPool::builder().build().await.unwrap(); /// /// let record_a = Character::find("123", &db_accessor).await.unwrap(); /// let record_b = Character::find("234", &db_accessor).await.unwrap(); /// /// let edge_record = DatabaseRecord::link(&record_a, &record_b, &db_accessor, |_from, _to| { /// Edge { _from, _to, description: "description".to_string() } /// }).await.unwrap(); /// # } /// ``` /// /// [`DatabaseRecord`]: struct.DatabaseRecord.html pub trait EdgeRecord: Record { /// Retrieves the struct `_from` field fn _from(&self) -> &String; /// Retrieves the struct `_to` field fn _to(&self) -> &String; /// Parses the `_from()` returned `id` and returns the document `key` /// /// # Panic /// /// The method will panic if the stored `id` is not formatted correctly (`String`/`String`) /// /// # Example ///```rust /// # use serde::{Serialize, Deserialize, de::DeserializeOwned}; /// use aragog::{EdgeRecord, Record, Validate, DatabaseRecord}; /// /// #[derive(EdgeRecord, Record, Clone, Serialize, Deserialize, Validate)] /// struct EdgeModel { /// pub _from: String, /// pub _to: String, /// } /// /// let edge = EdgeModel { /// _from: "User/123".to_string(), /// _to: "Client/345".to_string(), /// }; /// assert_eq!(edge._from_key(), "123".to_string()); /// ``` fn _from_key(&self) -> String { self._from().split('/').last().unwrap().to_string() } /// Parses the `_to()` returned `id` and returns the document `key` /// /// # Panic /// /// The method will panic if the stored `id` is not formatted correctly (`String`/`String`) /// /// # Example ///```rust /// # use serde::{Serialize, Deserialize, de::DeserializeOwned}; /// use aragog::{EdgeRecord, Record, Validate, DatabaseRecord}; /// /// #[derive(EdgeRecord, Record, Clone, Serialize, Deserialize, Validate)] /// struct EdgeModel { /// pub _from: String, /// pub _to: String, /// } /// /// let edge = EdgeModel { /// _from: "User/123".to_string(), /// _to: "Client/345".to_string(), /// }; /// assert_eq!(edge._to_key(), "345".to_string()); /// ``` fn _to_key(&self) -> String { self._to().split('/').last().unwrap().to_string() } /// Parses the `_to()` returned `id` and returns the document collection name /// /// # Panic /// /// The method will panic if the stored `id` is not formatted correctly (`String`/`String`) /// /// # Example ///```rust /// # use serde::{Serialize, Deserialize, de::DeserializeOwned}; /// use aragog::{EdgeRecord, Record, Validate, DatabaseRecord}; /// /// #[derive(EdgeRecord, Record, Clone, Serialize, Deserialize, Validate)] /// struct EdgeModel { /// pub _from: String, /// pub _to: String, /// } /// /// let edge = EdgeModel { /// _from: "User/123".to_string(), /// _to: "Client/345".to_string(), /// }; /// assert_eq!(edge._to_collection_name(), "Client".to_string()); /// ``` fn _to_collection_name(&self) -> String { self._to().split('/').next().unwrap().to_string() } /// Parses the `_from()` returned `id` and returns the document collection name /// /// # Panic /// /// The method will panic if the stored `id` is not formatted correctly (`String`/`String`) /// /// # Example ///```rust /// # use serde::{Serialize, Deserialize, de::DeserializeOwned}; /// use aragog::{EdgeRecord, Record, Validate, DatabaseRecord}; /// /// #[derive(EdgeRecord, Record, Clone, Serialize, Deserialize, Validate)] /// struct EdgeModel { /// pub _from: String, /// pub _to: String, /// } /// /// let edge = EdgeModel { /// _from: "User/123".to_string(), /// _to: "Client/345".to_string(), /// }; /// assert_eq!(edge._from_collection_name(), "User".to_string()); /// ``` fn _from_collection_name(&self) -> String { self._from().split('/').next().unwrap().to_string() } }