Perfectly solve the problem of inserting the same data in Thinkphp3.2

The following article brings you a perfect solution to the problem of inserting the same data in Thinkphp3.2. The content is quite good, so I will share it with you now and give it as a reference.

Problem description

When using TP3.2 to insert data today, in order to avoid inserting the same data (the so-called same data, its The primary key is the same or the fields of the unique index are the same). The index I created is as shown below. The primary key index is an auto-increment field. Duplication is impossible, that is, the unique index may be duplicated. What I want is uid, year, mounth, day. If the three fields appear the same, the current record will be updated.

Solution to the problem

When we faced such a problem before, we You know, MySQL provides ON DUPLICATE KEY UPDATE or REPLACE INTO to solve this problem.

Use ON DUPLICATE KEY UPDATE

Before inserting data, there is only one record in the table, as shown below

##The SQL statement is as follows , when inserting a record, if it is the same as the existing record in the table, the new record will be updated, otherwise the record will be inserted.

INSERT INTO `work_log` (
`uid`,
`year`,
`mounth`,
`day`,
`status`
) 
VALUES
(1, 2016, 6, 3, 1) 
ON DUPLICATE KEY 
UPDATE 
`status` = 
VALUES
(`status`),
`updated_ts` = NOW();

Use REPLACE INTO

The code is as follows:

First execute the following code to insert a piece of data

REPLACE INTO `work_log` (
`uid`,
`year`,
`mounth`,
`day`,
`status`
) 
VALUES
(1, 2016, 6, 2, 1)

The effect is as shown below

Execute the following code again , the code inserted above will be updated

REPLACE INTO `work_log` (
`uid`,
`year`,
`mounth`,
`day`,
`status`
) 
VALUES
(1, 2016, 6, 2, 5)

The effect is as shown below

ON DUPLICATE KEY UPDATE and REPLACE INTO difference

When the same value appears, ON DUPLICATE KEY UPDATE updates the existing record, and REPLACE INTO deletes the previous record and then inserts a new record.

Solution in Thinkphp3.2

In Thinkphp3.2, the same insert is processed through the third parameter of the add() function Data issues.

The add() method in Model.class.PHP calls the insert method in Db.class.php. In the insert method, we can see the following code:

$replace is exactly the third parameter in the add method.

Related recommendations:

thinkphp3.2.3 version database addition, deletion, modification and query implementation code

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