Hello.
The three queries below are conditions, so I want to write a prerequisite first and write a condition statement, but if one of those queries is undefined, the code stops due to an error.
const getEmptyCartQuery = await shopping_cart.findOne({
(...)
});
const needsUpdatedQuantityQuery = await shopping_cart.findOne({
(...)
});
const needsNewCartQuery = await shopping_cart.findOne({
(...)
});
So I made an exception with the try-catch statement and made the code as below.
const data = await shopping_cart.findAll({
where: { cart_id }
});
try {
const getEmptyCart = await shopping_cart.findOne({ (...) });
if (getEmptyCart) {
await shopping_cart.update({ (...) });
}
ctx.body = data;
} } catch (e) {
try {
const needsUpdatedQuantity = await shopping_cart.findOne({ (...) });
if (needsUpdatedQuantity) {
await shopping_cart.update({ (...) });
}
ctx.body = data;
} } catch (e) {
try {
const needsNewCart = await shopping_cart.findOne({ (...) });
if (needsNewCart) {
await shopping_cart.create({ (...) });
}
} } catch (e) {
ctx.status = 400;
ctx.body = e.message;
}
}
}
It goes back anyway, but do you use such overlapping try-catch statements? It looks so messy, but is there any way for the code to flow without an error during the db inquiry other than try-catch
If there is something that needs to be supplemented because there is something lacking in the questions I posted, please leave a comment.
Thank you.
javascript node.js koa try-catch
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