Question

我正在尝试使用存储过程来创建角色。该过程进行了一些验证，以确保params在插入数据库之前是有效的（让我们在数据库上保持此验证）。但是，当我尝试在我的Web界面中使用无效数据的过程时，没有结果集，并且不会发生错误承诺。如何使此过程在节点端导致错误，我该怎么做？

-- add a character with the universe performing the universe name lookup
CREATE OR REPLACE FUNCTION add_character(
  IN p_chr_name VARCHAR(255),
  IN p_unv_name VARCHAR(255),
  IN p_chr_bio  TEXT
)
  RETURNS INT AS $$
DECLARE
  unv_id  INTEGER := (SELECT unv_id
                      FROM universes
                        WHERE LOWER(unv_name) = LOWER(p_unv_name));
  new_id  INTEGER := NULL;
BEGIN
  IF unv_id IS NULL THEN
    RAISE EXCEPTION 'unv_id is null for %', p_unv_name;
  END IF;
  INSERT INTO characters(chr_name, chr_unv_id, chr_bio) VALUES
    (p_chr_name, unv_id, p_chr_bio)
  RETURNING chr_id INTO new_id;
  RETURN new_id;
END $$
LANGUAGE PLPGSQL;

javascript

app.post('/contrib/chr', (req, res) => {
    console.log(req.body);
    pool.query('SELECT add_character($1, $2, $3)'
        [req.body.chr_name, req.body.unv_name, req.body.chr_bio])
        .then((rows) => {
            console.log(rows);
            res.render('contrib');
        }).catch((err) => {
            console.error('contrib-chr-err', err);
            res.render('contrib');
        });
})

返回了行对象。

{ command: '', rowCount: NaN, rows: [], fields: null }

Answer 1

工作样本：

<强> SQL：

t=# create or replace function s110(_b boolean) returns int as
$$
begin
  if not _b then
   raise info '%','here is notice';
   raise warning '%','warning it is';
  end if;
  if _b then
   raise exception '%','final exception it is';
  end if;
 return 9;
end;
$$ language plpgsql;
CREATE FUNCTION

<强> JS

var pg = require('pg');
var client = new pg.Client({"database": "t"});
client.connect(function (err) {
  if (err) throw err;
  client.query('SELECT * from s110(true)', [], function (err, result) {
    if (err) throw err;
    console.log(result);
    client.end(function (err) {
      if (err) throw err;
    });
  });
});

生成

MacBook-Air:n vao$ vi q1.js && node q1.js /Users/vao/n/q1.js:6 if (err) throw err; ^ error: final exception it is at Connection.parseE (/Users/vao/node_modules/pg/lib/connection.js:569:11) at Connection.parseMessage (/Users/vao/node_modules/pg/lib/connection.js:396:17) at Socket.<anonymous> (/Users/vao/node_modules/pg/lib/connection.js:132:22) at emitOne (events.js:77:13) at Socket.emit (events.js:169:7) at readableAddChunk (_stream_readable.js:153:18) at Socket.Readable.push (_stream_readable.js:111:10) at TCP.onread (net.js:531:20)

如果我将 SELECT * from s110(true)更改为SELECT * from s110(false)：

MacBook-Air:n vao$ vi q1.js && node q1.js { command: 'SELECT', rowCount: 1, oid: NaN, rows: [ { s110: 9 } ], fields: [ { name: 's110', tableID: 0, columnID: 0, dataTypeID: 23, dataTypeSize: 4, dataTypeModifier: -1, format: 'text' } ], _parsers: [ [Function] ], RowCtor: [Function], rowAsArray: false, _getTypeParser: [Function: bound ] }

<强>更新此外，您可以获得STDOUT消息，几乎没有变化。我不擅长使用javascript，希望我不会在这里提出非常愚蠢的建议。如果您在.query上方添加此行：

client.connection.on('message', function(a) {console.log(a);}); client.query('SELECT s110(false)', [], function (err, result) {...

您将获得RAISE的所有console.log输出：

{ [notice: here is notice] name: 'notice', length: 123, severity: 'INFO', code: '00000', detail: undefined, hint: undefined, position: undefined, internalPosition: undefined, internalQuery: undefined, where: 'PL/pgSQL function s110(boolean) line 4 at RAISE', schema: undefined, table: undefined, column: undefined, dataType: undefined, constraint: undefined, file: 'pl_exec.c', line: '3165', routine: 'exec_stmt_raise' } { [notice: warning it is] name: 'notice', length: 128, severity: 'WARNING', code: '01000', detail: undefined, hint: undefined, position: undefined, internalPosition: undefined, internalQuery: undefined, where: 'PL/pgSQL function s110(boolean) line 5 at RAISE', schema: undefined, table: undefined, column: undefined, dataType: undefined, constraint: undefined, file: 'pl_exec.c', line: '3165', routine: 'exec_stmt_raise' } { name: 'dataRow', length: 11, fieldCount: 1, fields: [ '9' ] } { name: 'commandComplete', length: 13, text: 'SELECT 1' } { name: 'readyForQuery', length: 5, status: 'I' }

node-postgres不显示存储过程的结果集

1 个答案: