Rerun function from callback
up vote
0
down vote
favorite
Here is my pseudo code:
Model.observe('after save', function (ctx, next) {
const sql = `
BEGIN TRANSACTION ISOLATION LEVEL SERIALIZABLE;
-- ...
COMMIT;
`
ds.connector.query(sql, function (err, res) {
if (err) {console.log(err); return next(err)}
next()
})
}
I ttry to run a raw sql statement, but the db (postgres) return s with error:
code: '40001',
detail: 'Reason code: Canceled on identification as a pivot, during write.',
hint: 'The transaction might succeed if retried.',
so if err is raised in ds.connector.query I want to rerun ds.connector.query instead of sending back the error in Model.observe function's callback (next)
node.js postgresql loopbackjs
asked Nov 20 at 13:26
user3568719
473717
add a comment |
up vote
0
down vote
favorite
Here is my pseudo code:
Model.observe('after save', function (ctx, next) {
const sql = `
BEGIN TRANSACTION ISOLATION LEVEL SERIALIZABLE;
-- ...
COMMIT;
`
ds.connector.query(sql, function (err, res) {
if (err) {console.log(err); return next(err)}
next()
})
}
I ttry to run a raw sql statement, but the db (postgres) return s with error:
code: '40001',
detail: 'Reason code: Canceled on identification as a pivot, during write.',
hint: 'The transaction might succeed if retried.',
so if err is raised in ds.connector.query I want to rerun ds.connector.query instead of sending back the error in Model.observe function's callback (next)
node.js postgresql loopbackjs
asked Nov 20 at 13:26
user3568719
473717
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
Here is my pseudo code:
Model.observe('after save', function (ctx, next) {
const sql = `
BEGIN TRANSACTION ISOLATION LEVEL SERIALIZABLE;
-- ...
COMMIT;
`
ds.connector.query(sql, function (err, res) {
if (err) {console.log(err); return next(err)}
next()
})
}
I ttry to run a raw sql statement, but the db (postgres) return s with error:
code: '40001',
detail: 'Reason code: Canceled on identification as a pivot, during write.',
hint: 'The transaction might succeed if retried.',
so if err is raised in ds.connector.query I want to rerun ds.connector.query instead of sending back the error in Model.observe function's callback (next)
node.js postgresql loopbackjs
asked Nov 20 at 13:26
user3568719
473717
Here is my pseudo code:
Model.observe('after save', function (ctx, next) {
const sql = `
BEGIN TRANSACTION ISOLATION LEVEL SERIALIZABLE;
-- ...
COMMIT;
`
ds.connector.query(sql, function (err, res) {
if (err) {console.log(err); return next(err)}
next()
})
}
I ttry to run a raw sql statement, but the db (postgres) return s with error:
code: '40001',
detail: 'Reason code: Canceled on identification as a pivot, during write.',
hint: 'The transaction might succeed if retried.',
so if err is raised in ds.connector.query I want to rerun ds.connector.query instead of sending back the error in Model.observe function's callback (next)
node.js postgresql loopbackjs
node.js postgresql loopbackjs
asked Nov 20 at 13:26
user3568719
473717
asked Nov 20 at 13:26
user3568719
473717
asked Nov 20 at 13:26
user3568719
473717
asked Nov 20 at 13:26
user3568719
473717
asked Nov 20 at 13:26
user3568719
473717
473717
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
0
down vote
Not recommended since it can keep in an infinite loop, but it should works using recursive:
let failCount = 0, maxTry = 3;
Model.observe('after save', function (ctx, next) {
const sql = `
BEGIN TRANSACTION ISOLATION LEVEL SERIALIZABLE;
-- ...
COMMIT;
`
query(sql, next);
}
function query(sql, next) {
ds.connector.query(sql, function (err, res) {
if (err) {
console.log(err);
if (failCount < maxTry) {
query(sql, next); //querying again
failCount++;
} else {
next(err);
}
}
next()
});
}
edited Nov 23 at 16:03
marc_s
569k12811001250
answered Nov 20 at 13:32
Lucas Costa
3,58131231
but I could you some variable, to keep track how many times it has benn rerun, could not I?
– user3568719
Nov 20 at 13:39
Yes, I updated the answer simulating that.
– Lucas Costa
Nov 20 at 13:43
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
Not recommended since it can keep in an infinite loop, but it should works using recursive:
let failCount = 0, maxTry = 3;
Model.observe('after save', function (ctx, next) {
const sql = `
BEGIN TRANSACTION ISOLATION LEVEL SERIALIZABLE;
-- ...
COMMIT;
`
query(sql, next);
}
function query(sql, next) {
ds.connector.query(sql, function (err, res) {
if (err) {
console.log(err);
if (failCount < maxTry) {
query(sql, next); //querying again
failCount++;
} else {
next(err);
}
}
next()
});
}
edited Nov 23 at 16:03
marc_s
569k12811001250
answered Nov 20 at 13:32
Lucas Costa
3,58131231
but I could you some variable, to keep track how many times it has benn rerun, could not I?
– user3568719
Nov 20 at 13:39
Yes, I updated the answer simulating that.
– Lucas Costa
Nov 20 at 13:43
add a comment |
up vote
0
down vote
Not recommended since it can keep in an infinite loop, but it should works using recursive:
let failCount = 0, maxTry = 3;
Model.observe('after save', function (ctx, next) {
const sql = `
BEGIN TRANSACTION ISOLATION LEVEL SERIALIZABLE;
-- ...
COMMIT;
`
query(sql, next);
}
function query(sql, next) {
ds.connector.query(sql, function (err, res) {
if (err) {
console.log(err);
if (failCount < maxTry) {
query(sql, next); //querying again
failCount++;
} else {
next(err);
}
}
next()
});
}
edited Nov 23 at 16:03
marc_s
569k12811001250
answered Nov 20 at 13:32
Lucas Costa
3,58131231
but I could you some variable, to keep track how many times it has benn rerun, could not I?
– user3568719
Nov 20 at 13:39
Yes, I updated the answer simulating that.
– Lucas Costa
Nov 20 at 13:43
add a comment |
up vote
0
down vote
up vote
0
down vote
Not recommended since it can keep in an infinite loop, but it should works using recursive:
let failCount = 0, maxTry = 3;
Model.observe('after save', function (ctx, next) {
const sql = `
BEGIN TRANSACTION ISOLATION LEVEL SERIALIZABLE;
-- ...
COMMIT;
`
query(sql, next);
}
function query(sql, next) {
ds.connector.query(sql, function (err, res) {
if (err) {
console.log(err);
if (failCount < maxTry) {
query(sql, next); //querying again
failCount++;
} else {
next(err);
}
}
next()
});
}
edited Nov 23 at 16:03
marc_s
569k12811001250
answered Nov 20 at 13:32
Lucas Costa
3,58131231
Not recommended since it can keep in an infinite loop, but it should works using recursive:
let failCount = 0, maxTry = 3;
Model.observe('after save', function (ctx, next) {
const sql = `
BEGIN TRANSACTION ISOLATION LEVEL SERIALIZABLE;
-- ...
COMMIT;
`
query(sql, next);
}
function query(sql, next) {
ds.connector.query(sql, function (err, res) {
if (err) {
console.log(err);
if (failCount < maxTry) {
query(sql, next); //querying again
failCount++;
} else {
next(err);
}
}
next()
});
}
edited Nov 23 at 16:03
marc_s
569k12811001250
answered Nov 20 at 13:32
Lucas Costa
3,58131231
edited Nov 23 at 16:03
marc_s
569k12811001250
edited Nov 23 at 16:03
marc_s
569k12811001250
edited Nov 23 at 16:03
marc_s
569k12811001250
569k12811001250
answered Nov 20 at 13:32
Lucas Costa
3,58131231
answered Nov 20 at 13:32
Lucas Costa
3,58131231
answered Nov 20 at 13:32
Lucas Costa
3,58131231
3,58131231
but I could you some variable, to keep track how many times it has benn rerun, could not I?
– user3568719
Nov 20 at 13:39
Yes, I updated the answer simulating that.
– Lucas Costa
Nov 20 at 13:43
add a comment |
but I could you some variable, to keep track how many times it has benn rerun, could not I?
– user3568719
Nov 20 at 13:39
Yes, I updated the answer simulating that.
– Lucas Costa
Nov 20 at 13:43
but I could you some variable, to keep track how many times it has benn rerun, could not I?
– user3568719
Nov 20 at 13:39
but I could you some variable, to keep track how many times it has benn rerun, could not I?
– user3568719
Nov 20 at 13:39
Yes, I updated the answer simulating that.
– Lucas Costa
Nov 20 at 13:43
Yes, I updated the answer simulating that.
– Lucas Costa
Nov 20 at 13:43
add a comment |
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