141 lines
5.1 KiB
Markdown
141 lines
5.1 KiB
Markdown
# SeaORM SQLx example
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Prepare:
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Setup a test database and configure the connection string in `main.rs`.
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Run `bakery.sql` to setup the test table and data.
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Running:
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```sh
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cargo run
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```
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All about selects:
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```sh
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SqlxMySqlPoolConnection
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===== =====
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find all cakes: SELECT `cake`.`id`, `cake`.`name` FROM `cake`
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Model { id: 1, name: "New York Cheese" }
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Model { id: 2, name: "Chocolate Forest" }
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find all fruits: SELECT `fruit`.`id`, `fruit`.`name`, `fruit`.`cake_id` FROM `fruit`
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Model { id: 1, name: "Blueberry", cake_id: Some(1) }
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Model { id: 2, name: "Rasberry", cake_id: Some(1) }
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Model { id: 3, name: "Strawberry", cake_id: Some(2) }
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Model { id: 4, name: "Apple", cake_id: None }
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Model { id: 5, name: "Banana", cake_id: None }
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Model { id: 6, name: "Cherry", cake_id: None }
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Model { id: 7, name: "Lemon", cake_id: None }
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Model { id: 8, name: "Orange", cake_id: None }
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Model { id: 9, name: "Pineapple", cake_id: None }
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===== =====
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find cakes and fruits: SELECT `cake`.`id` AS `A_id`, `cake`.`name` AS `A_name`, `fruit`.`id` AS `B_id`, `fruit`.`name` AS `B_name`, `fruit`.`cake_id` AS `B_cake_id` FROM `cake` LEFT JOIN `fruit` ON `cake`.`id` = `fruit`.`cake_id`
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(Model { id: 1, name: "New York Cheese" }, Some(Model { id: 1, name: "Blueberry", cake_id: Some(1) }))
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(Model { id: 1, name: "New York Cheese" }, Some(Model { id: 2, name: "Rasberry", cake_id: Some(1) }))
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(Model { id: 2, name: "Chocolate Forest" }, Some(Model { id: 3, name: "Strawberry", cake_id: Some(2) }))
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===== =====
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find one by primary key: SELECT `cake`.`id`, `cake`.`name` FROM `cake` WHERE `cake`.`id` = 1 LIMIT 1
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Model { id: 1, name: "New York Cheese" }
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find one by name: SELECT `cake`.`id`, `cake`.`name` FROM `cake` WHERE `cake`.`name` LIKE '%chocolate%' LIMIT 1
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Some(Model { id: 2, name: "Chocolate Forest" })
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find models belong to: SELECT `fruit`.`id`, `fruit`.`name`, `fruit`.`cake_id` FROM `fruit` INNER JOIN `cake` ON `cake`.`id` = `fruit`.`cake_id` WHERE `cake`.`id` = 1
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Model { id: 1, name: "Blueberry", cake_id: Some(1) }
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Model { id: 2, name: "Rasberry", cake_id: Some(1) }
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===== =====
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count fruits by cake: SELECT `cake`.`name`, COUNT(`fruit`.`id`) AS `num_of_fruits` FROM `cake` LEFT JOIN `fruit` ON `cake`.`id` = `fruit`.`cake_id` GROUP BY `cake`.`name`
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SelectResult { name: "New York Cheese", num_of_fruits: 2 }
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SelectResult { name: "Chocolate Forest", num_of_fruits: 1 }
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===== =====
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find cakes and fillings: SELECT `cake`.`id` AS `A_id`, `cake`.`name` AS `A_name`, `filling`.`id` AS `B_id`, `filling`.`name` AS `B_name` FROM `cake` LEFT JOIN `cake_filling` ON `cake`.`id` = `cake_filling`.`cake_id` LEFT JOIN `filling` ON `cake_filling`.`filling_id` = `filling`.`id` ORDER BY `cake`.`id` ASC
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(Model { id: 1, name: "New York Cheese" }, [Model { id: 1, name: "Vanilla" }, Model { id: 2, name: "Lemon" }])
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(Model { id: 2, name: "Chocolate Forest" }, [Model { id: 2, name: "Lemon" }, Model { id: 3, name: "Mango" }])
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find fillings for cheese cake: SELECT `cake`.`id`, `cake`.`name` FROM `cake` WHERE `cake`.`id` = 1 LIMIT 1
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SELECT `filling`.`id`, `filling`.`name` FROM `filling` INNER JOIN `cake_filling` ON `cake_filling`.`filling_id` = `filling`.`id` INNER JOIN `cake` ON `cake`.`id` = `cake_filling`.`cake_id` WHERE `cake`.`id` = 1
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Model { id: 1, name: "Vanilla" }
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Model { id: 2, name: "Lemon" }
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find cakes for lemon: SELECT `filling`.`id`, `filling`.`name` FROM `filling` WHERE `filling`.`id` = 2 LIMIT 1
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SELECT `cake`.`id`, `cake`.`name` FROM `cake` INNER JOIN `cake_filling` ON `cake_filling`.`cake_id` = `cake`.`id` INNER JOIN `filling` ON `filling`.`id` = `cake_filling`.`filling_id` WHERE `filling`.`id` = 2
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Model { id: 1, name: "New York Cheese" }
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Model { id: 2, name: "Chocolate Forest" }
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```
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All about operations:
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```sh
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INSERT INTO `fruit` (`name`) VALUES ('pear')
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Inserted: InsertResult { last_insert_id: 21 }
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SELECT `fruit`.`id`, `fruit`.`name`, `fruit`.`cake_id` FROM `fruit` WHERE `fruit`.`id` = 21 LIMIT 1
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Pear: Some(Model { id: 21, name: "pear", cake_id: None })
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UPDATE `fruit` SET `name` = 'Sweet pear' WHERE `fruit`.`id` = 21
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Updated: ActiveModel { id: ActiveValue { value: 21, state: Unchanged }, name: ActiveValue { value: "Sweet pear", state: Set }, cake_id: ActiveValue { value: None, state: Unchanged } }
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===== =====
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INSERT INTO `fruit` (`name`) VALUES ('banana')
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SELECT `fruit`.`id`, `fruit`.`name`, `fruit`.`cake_id` FROM `fruit` WHERE `fruit`.`id` = 22 LIMIT 1
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Inserted: ActiveModel { id: ActiveValue { value: 22, state: Unchanged }, name: ActiveValue { value: "banana", state: Unchanged }, cake_id: ActiveValue { value: None, state: Unchanged } }
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UPDATE `fruit` SET `name` = 'banana banana' WHERE `fruit`.`id` = 22
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Updated: ActiveModel { id: ActiveValue { value: 22, state: Unchanged }, name: ActiveValue { value: "banana banana", state: Set }, cake_id: ActiveValue { value: None, state: Unchanged } }
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DELETE FROM `fruit` WHERE `fruit`.`id` = 22
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Deleted: DeleteResult { rows_affected: 1 }
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===== =====
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INSERT INTO `fruit` (`name`) VALUES ('pineapple')
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SELECT `fruit`.`id`, `fruit`.`name`, `fruit`.`cake_id` FROM `fruit` WHERE `fruit`.`id` = 23 LIMIT 1
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Saved: ActiveModel { id: ActiveValue { value: 23, state: Unchanged }, name: ActiveValue { value: "pineapple", state: Unchanged } }
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``` |