0.0.2 • Published 1 year ago
type-meta v0.0.2
type-meta
It has the meta information of the object type and runs several combination business logic based on the data.
sql builder example
import { Meta, sql, SQLType, Target } from 'objectmeta';
type TEACHER_FEEDBACK = {
// ...
}
type ACCOUNT = {
sid: string,
// ...
}
type TEACHER = {
// ...
}
type VISIT_INSTANCE = {
// ...
}
type Query = TEACHER_FEEDBACK & {
account: ACCOUNT;
teacher: TEACHER;
visit_instance: VISIT_INSTANCE;
}
const query: Meta<Query> = {
$target: 'teacher_feedback as teacher_feedback',
sid: {
$target: 'teacher_feedback.sid',
},
account: {
$target: 'account as account',
$relationship: {
operator: 'JOIN',
where: [
{
operandFirst: 'teacher_feedback.parent_account_sid',
operator: '=',
operandSecond: 'account.sid',
}
]
}
},
teacher: {
$target: 'teacher as teacher',
$relationship: {
operator: 'JOIN',
where: [
{
operandFirst: 'teacher_feedback.teacher_account_sid',
operator: '=',
operandSecond: 'teacher.account_sid',
}
]
}
},
visit_instance: {
$target: 'visit_instance',
$relationship: {
operator: 'JOIN',
where: [
{
operandFirst: 'teacher_feedback.visit_instance_sid',
operator: '=',
operandSecond: 'visit_instance.sid',
}
]
}
},
$where: [
{
operandFirst: 'teacher_feedback.created_at',
operator: '>',
operandSecond: 'DATE_SUB(NOW(), INTERVAL 1 MONTH)',
}
]
}
const data = sql('SELECT', query);
console.log('sql', data);
SELECT teacher_feedback.sid
from teacher_feedback as teacher_feedback
JOIN account as account ON teacher_feedback.parent_account_sid = account.sid
JOIN teacher as teacher ON teacher_feedback.teacher_account_sid = teacher.account_sid
JOIN visit_instance ON teacher_feedback.visit_instance_sid = visit_instance.sid
where teacher_feedback.created_at > DATE_SUB(NOW(), INTERVAL 1 MONTH)