pg-promise

问题 pg-promise helpers : optionnal fields in insert and multiple-update I have some question about non-required fields for insert and update statement INSERT STATEMENT With this post I defined a ColumnSet that contains optionals fields ( stype , sspeed , disup ). It works but I just want to know a little detail: You can see that the ColumnSet define the value of state as "false" if the object don't have the property. In the database the field "disup" is defined to "false" as default, so do I

问题 Pg-promise is Not returning anything for 60s and gets timed out while running server setup with express-generator. There are no error messages. All the routes without db.any or similar query, works fine. The routes with db.* times out. But, the same connection/route/query works perfectly with a simple express app. I am running this from AWS EC2. Here is the test sample express that worked fine. Same route in routes/index.js does not work - gets timed out. const express = require('express');

问题 I am trying to insert linked data in a pg-promise transaction. The transaction successfully inserts all the data correctly, but gives a warning UnhandledPromiseRejectionWarning: Error: Querying against a released or lost connection. . The code that causes this was originally: const item = { batch: { batch_number: 1 }, ingredients: [ { amount: '12', unit: 'kg' }, { amount: '4', unit: 'L' } ], } return await db.tx(async t => { const batchQueryString = pgp.helpers.insert(item.batch, null,

问题 I am trying to insert linked data in a pg-promise transaction. The transaction successfully inserts all the data correctly, but gives a warning UnhandledPromiseRejectionWarning: Error: Querying against a released or lost connection. . The code that causes this was originally: const item = { batch: { batch_number: 1 }, ingredients: [ { amount: '12', unit: 'kg' }, { amount: '4', unit: 'L' } ], } return await db.tx(async t => { const batchQueryString = pgp.helpers.insert(item.batch, null,

问题 I need to make a query with pg-promise using the result to make 3 others queries but i am getting this error when executing: Unhandled rejection TypeError: Method 'batch' requires an array of values. at batch (C:\apps\pfc\node_modules\spex\lib\ext\batch.js:61:26) at C:\apps\pfc\node_modules\spex\lib\ext\batch.js:149:26 at Task.batch (C:\apps\pfc\node_modules\pg-promise\lib\task.js:120:39).............. This is my code: db.task(t => { return t.one('select gid, idgrupo from orden where gid = $1

问题 I am using pgp.helpers.insert to save data into PostgreSQL which is working well. However, I need to return values to present in a response. I am using: this.collection.one(this.collection.$config.pgp.helpers.insert(values, null, 'branch')) which returns no data. What I want to be able to do is return the branch id after a successful insert, such as: INSERT into branch (columns) VALUES (values) RETURNING pk_branchID 回答1: Simply append the RETURNING... clause to the generated query: var h =

问题 I am using 'duration' property from data object of 'result' function to measure the duration of execution of my query. I tried the same query in pgAdmin with "EXPLAIN ANALYSE". Both have a big difference. can anyone say why is this? which is the right approach to measure the execution duration of my query. 回答1: EXPLAIN ANALYSE is a performance perspective internal to the server only. duration provided by method result of pg-promise includes: preparing the query for execution sending the query

问题 My question is based on Combine nested loop queries to parent array result - pg-promise. I'm having a similar scenario but have multiple queries to be combined to get my final results. Following is my code with which I tried to implement my requirement. But I was not able to get the results from second query combined with the main query. I'm a beginner and would like to know the correct way of implementation. db.task(t => { const a = studies => t.any ('SELECT facility_contacts.name, facility

问题 In the example on how to use parameterized queries with an IN clause, the syntax is as follows: const data = [1, 'two', 3, 'four']; db.any('SELECT * FROM table WHERE id IN ($1:csv)', [data]) .then(data => { ... I can't seem to get this to work for named parameters: db.manyOrNone('SELECT widget FROM widgets WHERE id IN ($(ids:list))', { ids: [1, 2, 3] }) (I'm using :list since it appears to be interchangeable with :csv ). I've tried various combinations like: ($(ids):list) (syntax error at or

问题 I'm going through an example from pg-promise for method map: // Build a list of active users, each with the list of user events: db.task(t => { return t.map('SELECT id FROM Users WHERE status = $1', ['active'], user => { return t.any('SELECT * FROM Events WHERE userId = $1', user.id) .then(events=> { user.events = events; return user; }); }).then(t.batch); }) .then(data => { // success }) .catch(error => { // error }); Let's say the Event entity has a one to many relationship with e.g. Cars ,