Php 如何在其他函数-Postgresql中使用返回id的值作为参数

单击按钮时，我希望发生两件事：

使用Insert_函数将表单数据插入表_1

使用表_1中新插入行的id作为函数的参数：other_func_name（id）

insert_函数如下所示：

function insert_function(jsnPolygon, callback) {
    delete jsnPolygon.id; // makes sure to give it a fresh id
    $.ajax({
        url: 'php/insert_record.php',
        data: jsnPolygon,
        type: 'POST',
        success: function (response) {
            if (response.substr(0, 5) == "ERROR") {
                alert(response);
            } else {
                switch (jsnPolygon.tbl) {
                    case "table_1":
                        break;    
                }
            }
        },
        error: function (xhr, status, error) {
            alert("AJAX Error: " + error);
        }
    });
};

$sqlQuery="INSERT INTO {$table} ({$keys}created, createdby, modified, modifiedby) 
           VALUES ({$vals}current_date, '{$username}', current_date, '{$username}') 
           RETURNING id";
            $result = $pdo->prepare($sqlQuery);
            $result->execute($_POST);
            echo $sqlQuery;

$sqlQuery="INSERT INTO {$table} ({$keys}created, createdby, modified, modifiedby) 
VALUES ({$vals}current_date, '{$username}', current_date, '{$username}') 
RETURNING id as id";
            $result = $pdo->prepare($sqlQuery);
            $result->execute($_POST);
            $id = $result->fetchColumn();
echo $id;

function insert_function(jsnPolygon, callback) {
    delete jsnPolygon.id; // makes sure to get a fresh id
    return new Promise((resolve, reject)=>{
    $.ajax({
        url: 'php/insert_record.php',
        data: jsnPolygon,
        type: 'POST',
        success: resolve,
        error: reject
    }); 
    });
}

insert_记录查询如下所示：

function insert_function(jsnPolygon, callback) {
    delete jsnPolygon.id; // makes sure to give it a fresh id
    $.ajax({
        url: 'php/insert_record.php',
        data: jsnPolygon,
        type: 'POST',
        success: function (response) {
            if (response.substr(0, 5) == "ERROR") {
                alert(response);
            } else {
                switch (jsnPolygon.tbl) {
                    case "table_1":
                        break;    
                }
            }
        },
        error: function (xhr, status, error) {
            alert("AJAX Error: " + error);
        }
    });
};

$sqlQuery="INSERT INTO {$table} ({$keys}created, createdby, modified, modifiedby) 
           VALUES ({$vals}current_date, '{$username}', current_date, '{$username}') 
           RETURNING id";
            $result = $pdo->prepare($sqlQuery);
            $result->execute($_POST);
            echo $sqlQuery;

$sqlQuery="INSERT INTO {$table} ({$keys}created, createdby, modified, modifiedby) 
VALUES ({$vals}current_date, '{$username}', current_date, '{$username}') 
RETURNING id as id";
            $result = $pdo->prepare($sqlQuery);
            $result->execute($_POST);
            $id = $result->fetchColumn();
echo $id;

function insert_function(jsnPolygon, callback) {
    delete jsnPolygon.id; // makes sure to get a fresh id
    return new Promise((resolve, reject)=>{
    $.ajax({
        url: 'php/insert_record.php',
        data: jsnPolygon,
        type: 'POST',
        success: resolve,
        error: reject
    }); 
    });
}

插入数据很好，但是如何让其他函数名（id）理解id的值呢

---

我使用的是PostgreSQL 12.0。

插入的

。。。返回

query返回一个行集，就像

select

一样。您可以通过调用而不是调用来获取返回的值。

经过漫长的两天和多次精神崩溃，我终于解决了这个问题。事实证明，这是问题中的几个挑战

首先，使用

fetchColumn

解决了从insert_记录获取id的问题，如下所示：

function insert_function(jsnPolygon, callback) {
    delete jsnPolygon.id; // makes sure to give it a fresh id
    $.ajax({
        url: 'php/insert_record.php',
        data: jsnPolygon,
        type: 'POST',
        success: function (response) {
            if (response.substr(0, 5) == "ERROR") {
                alert(response);
            } else {
                switch (jsnPolygon.tbl) {
                    case "table_1":
                        break;    
                }
            }
        },
        error: function (xhr, status, error) {
            alert("AJAX Error: " + error);
        }
    });
};

$sqlQuery="INSERT INTO {$table} ({$keys}created, createdby, modified, modifiedby) 
           VALUES ({$vals}current_date, '{$username}', current_date, '{$username}') 
           RETURNING id";
            $result = $pdo->prepare($sqlQuery);
            $result->execute($_POST);
            echo $sqlQuery;

$sqlQuery="INSERT INTO {$table} ({$keys}created, createdby, modified, modifiedby) 
VALUES ({$vals}current_date, '{$username}', current_date, '{$username}') 
RETURNING id as id";
            $result = $pdo->prepare($sqlQuery);
            $result->execute($_POST);
            $id = $result->fetchColumn();
echo $id;

function insert_function(jsnPolygon, callback) {
    delete jsnPolygon.id; // makes sure to get a fresh id
    return new Promise((resolve, reject)=>{
    $.ajax({
        url: 'php/insert_record.php',
        data: jsnPolygon,
        type: 'POST',
        success: resolve,
        error: reject
    }); 
    });
}

然后，一个新的问题出现在如何构建

insert\u函数（jsnPolygon）

上。由于其异步性质，它没有返回任何内容。我用Promise解决了这个问题，并重写如下：

function insert_function(jsnPolygon, callback) {
    delete jsnPolygon.id; // makes sure to give it a fresh id
    $.ajax({
        url: 'php/insert_record.php',
        data: jsnPolygon,
        type: 'POST',
        success: function (response) {
            if (response.substr(0, 5) == "ERROR") {
                alert(response);
            } else {
                switch (jsnPolygon.tbl) {
                    case "table_1":
                        break;    
                }
            }
        },
        error: function (xhr, status, error) {
            alert("AJAX Error: " + error);
        }
    });
};

$sqlQuery="INSERT INTO {$table} ({$keys}created, createdby, modified, modifiedby) 
           VALUES ({$vals}current_date, '{$username}', current_date, '{$username}') 
           RETURNING id";
            $result = $pdo->prepare($sqlQuery);
            $result->execute($_POST);
            echo $sqlQuery;

$sqlQuery="INSERT INTO {$table} ({$keys}created, createdby, modified, modifiedby) 
VALUES ({$vals}current_date, '{$username}', current_date, '{$username}') 
RETURNING id as id";
            $result = $pdo->prepare($sqlQuery);
            $result->execute($_POST);
            $id = $result->fetchColumn();
echo $id;

function insert_function(jsnPolygon, callback) {
    delete jsnPolygon.id; // makes sure to get a fresh id
    return new Promise((resolve, reject)=>{
    $.ajax({
        url: 'php/insert_record.php',
        data: jsnPolygon,
        type: 'POST',
        success: resolve,
        error: reject
    }); 
    });
}

最后，点击事件的棘手部分被更改为：

insert_function(jsnPolygon).then(result =>{
                var id = result;
                other_func_name(id);
            })
            .catch(err =>{
                alert("ERROR")
            });

---

希望对别人有帮助

我对这个很陌生，所以我需要更多的线索。将“执行”更改为“查询”没有帮助。insert_函数中不应该有“return id；”或其他内容吗？是的，对query（）的调用将返回一个行集。ID将位于第一行的第一列中。