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POWhy is it duplicating answers when inserting them into database?
primarykey
Id
12887798
data
AcceptedAnswerId
12887855
AnswerCount
1
ClosedDate
CommentCount
5
CommunityOwnedDate
CreationDate
2012-10-15T00:12:05.300
FavoriteCount
0
LastActivityDate
2012-10-15T00:33:59.177
LastEditDate
2012-10-15T00:21:39.750
LastEditorUserId
1701484
OwnerUserId
1701484
ParentId
0
PostTypeId
1
Score
0
ViewCount
70
LastEditorDisplayName
text
Body
I am inserting values into a "Question" and "Answer" Table. Now the Question Table is fine as that if I insert 2 questions then the table it displays is below: <pre><code>SessionId (PK) QuestionId(Pk) QuestionContent RZC 1 Name 2 things you will find with a computer RZC 2 Name three things you will find in a toolbox </code></pre> But the "Answer" Table is causing the problem, it duplicates the answers when it inserts, the table currently looks like below: <pre><code>AnswerId (auto PK) SessionId QuestionId Answer 1 RZC 1 A 2 RZC 1 C 3 RZC 2 A 4 RZC 2 B 5 RZC 2 E 6 RZC 1 A 7 RZC 1 C 8 RZC 2 A 9 RZC 2 B 10 RZC 2 E </code></pre> The table should look like below: <pre><code>AnswerId (auto PK) SessionId QuestionId Answer 1 RZC 1 A 2 RZC 1 C 3 RZC 2 A 4 RZC 2 B 5 RZC 2 E </code></pre> Why is it duplicating answers? Below is the php and mysqli code: <pre><code> <?php var_dump($_POST); // Prepare your statements ahead of time $questionsql = 'INSERT INTO Question (SessionId, QuestionId, QuestionContent) VALUES (?, ?, ?)'; if (!$insert = $mysqli->prepare($questionsql)) { // Handle errors with prepare operation here echo __LINE__.': '.$mysqli->error; } $answersql = 'INSERT INTO Answer (SessionId, QuestionId, Answer) VALUES (?, ?, ?)'; if (!$insertanswer = $mysqli->prepare($answersql)) { // Handle errors with prepare operation here echo __LINE__.': '.$mysqli->error; } //make sure both prepared statements succeeded before proceeding if( $insert && $insertanswer) { $sessid = $_SESSION['id'] . ($_SESSION['initial_count'] > 1 ? $_SESSION['sessionCount'] : ''); $c = count($_POST['numQuestion']); for($i = 0; $i < $c; $i++ ) { $insert->bind_param('sis', $sessid, $_POST['numQuestion'][$i], $_POST['questionText'][$i]); $insert->execute(); if ($insert->errno) { // Handle query error here echo __LINE__.': '.$insert->error; break 2; } $results = $_POST['value']; foreach($results as $id => $value) { $answer = $value; $lastID = $insert->insert_id; foreach($value as $answer) { $insertanswer->bind_param('sis', $sessid, $lastID, $answer); $insertanswer->execute(); if ($insertanswer->errno) { // Handle query error here echo __LINE__.': '.$insertanswer->error; break 3; } } } } //close your statements at the end $insertanswer->close(); $insert->close(); } ?> </code></pre> The var_dump($_POST) shows this below: <pre><code>array(4) { ["numQuestion"]=> array(2) { [0]=> string(1) "1" [1]=> string(1) "2" } ["questionText"]=> array(2) { [0]=> string(20) "What is 2+2 and 3+3?" [1]=> string(41) "Which three items will you find in a car?" } ["submitDetails"]=> string(14) "Submit Details" ["value"]=> array(2) { [1]=> array(2) { [0]=> string(1) "A" [1]=> string(1) "C" } [2]=> array(3) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "D" } } } </code></pre>
Tags
<php><mysqli>
Title
Why is it duplicating answers when inserting them into database?
singulars
PostAcceptedAnswerId
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USuser1701484
UserOwnerUserId
1. USuser1701484
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId

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