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What is the procedure for creating a personalized JSON object using SQLC in Golang?

asked 2023-03-08 11:00:00 +0000

scrum gravatar image

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answered 2022-10-11 22:00:00 +0000

lakamha gravatar image

To create a personalized JSON object using SQLC in Golang, follow these steps:

  1. First, define your query in a .sql file. This file should be located in a directory designated as the query directory in your SQLC configuration file.

  2. Next, run the sqlc generate command to generate Go code that handles the SQL queries in the .sql files. This command generates a file named db.go with functions that can be called from your Go code to execute the queries.

  3. Use the generated function to execute your query and retrieve the results from the database.

  4. Create a struct that corresponds to your JSON object's structure.

  5. Map the database query results to the struct fields.

  6. Finally, use the json.Marshal() function to convert the struct to a JSON object.

An example code snippet is provided below:

// Define your query in a .sql file
-- name: get_person_by_id
SELECT name, age FROM person WHERE id = $1;

// Generate Go code with sqlc
sqlc generate

// Use the generated function to execute the query
person, err := db.GetPersonByID(ctx, id)

// Create a struct that corresponds to your JSON object's structure
type Person struct {
    Name string `json:"name"`
    Age  int    `json:"age"`
}

// Map the database query results to the struct fields
p := Person{Name: person.Name, Age: person.Age}

// Convert the struct to a JSON object
jsonPerson, err := json.Marshal(p)

Note that this code assumes that the db object created by SQLC's code generation contains a GetPersonByID function that executes the get_person_by_id query and returns a Person object.

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Asked: 2023-03-08 11:00:00 +0000

Seen: 14 times

Last updated: Oct 11 '22