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main.go
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main.go
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package main
import (
"database/sql"
"fmt"
"log"
"time"
"github.com/jmoiron/sqlx"
_ "github.com/mattn/go-sqlite3"
qf "github.com/tmw/queryfilter"
)
var (
DatabaseName = "local.db"
Schema = `
CREATE TABLE IF NOT EXISTS tasks (
id INTEGER PRIMARY KEY AUTOINCREMENT,
title TEXT NOT NULL,
status TEXT NOT NULL,
story_points INTEGER NOT NULL,
due_date DATETIME NOT NULL
);
`
Seed = `
INSERT OR IGNORE INTO tasks (id, title, status, story_points, due_date) VALUES
(1, 'Code Review Workflow Management', 'done', 5, '2023-01-20'),
(2, 'Agile Project Planning Tools', 'doing', 8, '2023-05-05'),
(3, 'Continuous Integration Automation Framework', 'todo', 3, '2023-07-31'),
(4, 'Version Control System Integration', 'done', 2, '2023-02-14'),
(5, 'Test Case Management System', 'doing', 1, '2023-03-23');
`
)
type Filters struct {
Status *[]string `filter:"status,op=in"`
MinPoints *int `filter:"story_points,op=gte"`
MaxPoints *int `filter:"story_points,op=lte"`
DueBefore *time.Time `filter:"due_date,op=gt"`
}
type Task struct {
ID int64
Title string
Status string
StoryPoints int `db:"story_points"`
DueDate time.Time `db:"due_date"`
}
func setupDatabase() *sqlx.DB {
db := sqlx.MustConnect("sqlite3", DatabaseName)
db.MustExec(Schema)
db.MustExec(Seed)
return db
}
func main() {
db := setupDatabase()
defer db.Close()
statuses, minPoints, maxPoints := []string{"todo", "doing"}, 2, 5
filter := Filters{
Status: &statuses,
MinPoints: &minPoints,
MaxPoints: &maxPoints,
}
query, vars, err := qf.ToSQL(filter)
if err != nil {
log.Fatal(err)
}
query = fmt.Sprintf("SELECT * FROM tasks WHERE %s LIMIT 1", query)
fmt.Printf("query: %s\n", query)
fmt.Printf("vars: %v\n", vars)
var task Task
if err := db.Get(&task, query, vars...); err != nil {
log.Fatal(err)
}
if err == sql.ErrNoRows {
fmt.Println("no records found")
return
}
if err != nil {
log.Fatal(err)
}
fmt.Printf("result: %+v\n", task)
}