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POCall to a member function fetch_assoc() on a non-object - pretty sure sql query is correct
 

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  1. POCall to a member function fetch_assoc() on a non-object - pretty sure sql query is correct
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    <p>I've searched on SO already for an answer to my problem, without any luck. As far as I can tell, there should be no problems with my sql query:</p> <pre><code>SELECT * FROM scores WHERE `primary_id`=$id; </code></pre> <p>I definitely have a table called "scores" with a column called "primary_id", and I can perform inserts, updates etc on it with no problems. However whenever I try to perform a select, I get the "Call to a member function fetch_assoc() on a non-object" error. All of the posts I've seen suggest it is caused by the sql query failing and returning false. The odd thing is, that even though the while ( $row = $result->fetch_assoc() ) throws an error, it still performs the update query contained inside. Maybe that's not odd to someone more experienced, but to me if the "while" call fails I wouldn't expect the contents to be executed, especially seeing as it somehow still gets the fields from $row.</p> <p>Here is the code.</p> <pre><code>date_default_timezone_set('UTC'); $currentWeek = date("W"); $currentMonth = date("m"); $sql = "SELECT * FROM scores WHERE primary_id=$id;"; $result = $this-&gt;db-&gt;query($sql) or trigger_error(mysql_error().$sql); if (!$result) { die('Something went wrong: '.$mysqli-&gt;error()); } else { echo "result exists";//this successfully echoes, so $result must exist } while ( $row = $result-&gt;fetch_assoc() ){ $week = $row['scoreweek']; $month = $row['scoremonth']; if($row['weekNumber'] != $currentWeek){ $week = 0; } if($row['monthNumber'] != $currentMonth){ $month = 0; } $sql = "UPDATE scores SET `weekNumber` = $currentWeek, `monthNumber` = $currentMonth, `scoreweek` = $week + $score, `scoremonth` = $month + $score, `scoreall` = `scoreall` + $score WHERE `primary_id` = $id;"; $result = $this-&gt;db-&gt;query($sql); } </code></pre> <p>Have I missed something obvious? I've tried the statement with and without apostrophes in various places, but with no luck.</p> <p>Edit: calling var_dump($result) gives me the following:</p> <pre><code>object(mysqli_result)#3 (5) { ["current_field"]=&gt; int(0) ["field_count"]=&gt; int(8) ["lengths"]=&gt; NULL ["num_rows"]=&gt; int(1) ["type"]=&gt; int(0) } </code></pre>
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    1. This table or related slice is empty.
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    1. USTheBestBigAl
    1. USTheBestBigAl
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. COEcho out your `$sql`. Does it work when you run it in the database? Also, your `trigger_error` call is running `mysql_error`, but the rest of your code looks like it's using mysqli_*.
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      1. POCall to a member function fetch_assoc() on a non-object - pretty sure sql query is correct
      1. USandrewsi
    2. COAlso, try a `var_dump($result)` to see what's actually in there.
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      1. POCall to a member function fetch_assoc() on a non-object - pretty sure sql query is correct
      1. USandrewsi
    3. COMay be `$this->db` is not an object of `mysqli`
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      1. POCall to a member function fetch_assoc() on a non-object - pretty sure sql query is correct
      1. USNikhil Mohan
 

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