I'm a novice coder. My website is set up to post blog content directly into our heroku database (long story). I normally insert the blog content in Terminal, accessing the database with heroku psql
I use this same format every time to post a blog and it has worked well.
INSERT INTO posts (content, title, created_at, updated_at,
thumbnail_url, summary, author_id) VALUES ('
<!DOCTYPE html>
<html>
...
</html>', 'Title', NOW(), NOW(), '/assets/images/name.jpeg', '“Said” — said no one ever.', 1);
Usually it tells me the content has been inserted.
But today it is just ending with this.
[directoryname]::DATABASE'>
I don't really even know how to refer to this stuff. I hit Control+C and tried again. Same result.
Help.
Nm, in writing this question, I figured out the answer. Somehow a ' had escaped me in the copy. Not sure how it escaped my command+f. I've noticed sometimes my single quotes ' aren't actually single quotes. In that they don't come up when I search '. I assume they must be some other character. Any idea how to resolve that?
Related
I’ve got a problem.
The select box of “Job No.#” can render data from MySQL, but the select box of “Address” cannot.
Field “address” and field “job_number” come from the same table.
But if I create a new field, like “newAddress”, with the same data as in “address”, it works~,
But just changing the “address” to “newAddress” doesn’t work.
In addition to the “address” field, several other fields in this table cannot be rendered either.
The database structure should be ok~ because I am able to fetch() and print the data from the “address” with the same SQL sentence.
And it is working all right on other tables~
Could you please? Thank you very much!
I've solved it!
The reason is a kind of “-” symbol input by users before.
The "-" is longer than normal -.
json_encode() cannot encode it, and it is displayed as garbled code when I print it out directly.
I have a problem which I have been trying to resolve since yesterday. I am trying to pass an SQL Query via $wpdb on wordpress but I keep getting an empty array when I try to echo the result.
I have tried print_r and var_dump and both are giving me empty values. I would appreciate if someone can help as I cannot seem to get this thing sorted.
I have also tried calling the table via the db prefix with still no success.
Below is the code I have been using
<?php
global $wpdb;
$results = $wpdb->get_results("SELECT CURRENT FROM upper_winds WHERE LVL=&level AND REGION=®ion AND VALID=&valid");
echo $results;
?>
P.S I have also tried get_var with the same problems.
Thanks
I noticed you weren't accounting for the wordpress database prefix, which could be why your results aren't showing up. You can prepend the prefix to your table name by using $wpdb->prefix.
I would suggest trying the following code:
global $wpdb;
$results = $wpdb->get_results("SELECT * FROM ".$wpdb->prefix."upper_winds WHERE LVL = 'level' AND REGION = 'region' AND VALID = 'valid'");
echo $results;
I also just wanted to point out that it's important to use $wpdb->prepare to protect against SQL Injection attacks. Any time you are writing your own SQL, you need to use $wpdb->prepare. However when you use methods like $wpdb->insert or $wpdb->update that don't require you to write any SQL, then you do not need to use $wpdb->prepare because those functions take care of SQL Escaping for you. I can't provide sample code without knowing which of your values are strings and which values are integers.
See: http://codex.wordpress.org/Class_Reference/wpdb#Protect_Queries_Against_SQL_Injection_Attacks
you need to prefix your table more than likely this is wp_ etc..
<?php
global $wpdb;
$results = $wpdb->get_results("SELECT * FROM `wp_upper_winds`
WHERE `LVL`='$level'
AND `REGION`='$region'
AND `VALID`='$valid'
");
var_dump ($results);
?>
you are looking for strings in your columns but using the &?
Thanks for your great advice and input. Eventually I got it to work.
The problem was not only in the code as I had been changing my code many times to try to find the solution. Eventually the main problem was nailed down to the table. Within one of the columns I had data which was something like this 'EU-VFR'. Apparently $wpdb did not pick up values with a '-'. Luckily with your help and some debugging I realised.
Here is what I got now http://howtoflyahelicopter.com/upper-winds-and-temp/
Thanks again :)
Hey guys this has been tripping me up quite a bit. So here is the general problem:
I am writing an application that requires users to enter their Summoner Names from league of legends. I do a pretty simple data scrape of a match and enter the data into my database. Unfortunately I am having some errors registering users with "special characters".
For this example I will use one problem user: RIÇK
As you can see RICK != RIÇK. So when I do the data scrub from the site I get the correct value which I push onto an array for later use.
Once I need the player names I pull from the array as follows: (player_names is the array)
#temp_player = User.find_by_username(player_names[i].to_s)
The problem is the users with any special characters are not being pulled. Should I not be using find_by? Is to_s changing my original values? I am really quite lost on what to do and would greatly appreciate any help / advice.
Thanks in advance,
Dan
I would like to thank Brian Kung for the link to the following: joelonsoftware.com/articles/Unicode.html It does a great job giving the bare minimum a programmer truly needs to understand.
For my particular issue I had used a HTML scraper to get the contents but which kept HTML entries throughout. When using these with my SQL lookups it was obvious that things were not being found. In order to fix this I used the HTMLEntities Gem to decode the text as follows (as soon as I put the into the array originally):
requires 'RubyGems' #without this cannot include htmlentries as a gem
requires 'HTMLEntries'
coder = HTMLEntries.new
line = '<'
player_names.push(coder.decode(line))
The Takeaway
When working with text and if running into errors I would strongly recommend tracing the strings you are working with to the origin and truly understanding what encoding is being used in each process. By doing this you can easily find where things are going wrong.
I recently wrote a mailing platform for one of our employees to use. The system runs great, scales great, and is fun to use. However, it is currently inoperable due to a bug that I can't figure out how to fix (fairly inexperienced developer).
The process goes something like this...
Upload a CSV file to a specific FTP directory.
Go to the import_mailing_list page.
Choose a CSV file within the FTP directory.
Name and describe what the list contains.
Associate file headings with database columns.
Then, the back-end loops over each line of the file, associating the values with a heading, and importing these values into a database.
This all works wonderfully, except in a specific case, when a raw CSV is not correctly formatted. For example...
fname, lname, email
Bob, Schlumberger, bob#bob.com
Bobbette, Schlumberger
Another, Record, goeshere#email.com
As you can see, there is a missing comma on line two. This would cause an error when attempting to pull "valArray[3]" (or valArray[2], in the case of every language but mine).
I am looking for the most efficient solution to keep this error from happening. Perhaps I should check the array length, and compare it to the index we're going to attempt to pull, before pulling it. But to do this for each and every value seems inefficient. Anybody have another idea?
Our stack is ColdFusion 8/9 and MySQL 5.1. This is why I refer to the array index as [3].
There's ArrayIsDefined(array, elementIndex), or ArrayLen(array)
seems inefficient?
You gotta code what you need to code, forget about inefficiency. Get it right before you get it fast (when needed).
I suppose if you are looking for another way of doing this (instead of checking the array length each time, although that really doesn't sound that bad to me), you could wrap each line insert attempt in a try/catch block. If it fails, then stuff the failed row in a buffer (including the line number and error message) that you could then display to the user after the batch has completed, so they could see each of the failed lines and why they failed. This has the advantages of 1) not having to explicitly check the array length each time and 2) catching other errors that you might not have anticipated beforehand (maybe a value is too long for your field, for example).
I have the following query to one of my database tables:
select count(*) as mycount
from mytable
where fieldone = :fieldone
and fieldtwo = :fieldtwo
Parameters are correctly loaded into the query (both of type String).
When I run this query outside the app (for instance, through the dbexplore) and replace the parameters with the actual values, I get the correct result. But when running it in the app, I get a Field 'fieldtwo' not found error, right on the Query.Open call.
Why would the BDE not find this field, when it actually exist?
Update: The following query, executed right after the first one (the one that fails), works fine in the app:
select *
from mytable
where fieldone = :fieldone
order by fieldone, fieldtwo
The best guess is that you have populated the field list in the query, this overrides any concept of the underlying fields that are in the query and is a cause of countless confusion.
Right click on the query, pick the fields editor clear all the values that are there and then choose 'add all fields' that should cause the missing field to appear once the query is executed.
I think it should auto-populate the fields if there are no defined fields when the query is executed, so you may not need to choose 'add all fields' after clearing the fields.
Whenever we come across a problem like this we tend to remove the query from the form and create it dynamically at run time... It depends how ingrained into the form it is...
E.g. If you have a data aware control looking at "fieldtwo" which tries to fetch some data when the underlying data set gets updated then it'll trigger an error like this, but it's more obvious when you've written code such
SomeEdit.Text = Query.FieldByName("fieldtwo").AsString;
That way it falls over on the relevant line instead of the open (triggering a related event)
Clear the query content using Query1.SQL.Clear; statement before opening it.
Other reason can be you are opening other database which may not have the specified field. Be sure that both the DatabaseName's in your app and dbexplore are same
I used to face porblems with BDE when i have SQLExplorer open and the app accesses the DB at the same time (but i had errors like ), try closing the Explorer it may help, if not i would build the SQL as text without the Parameters and try if it works then (if its possible in your situation).
I don't use parameters, so I'm just grabbing at straws here. I still use the BDE regularly, but am no expert. I find I shy away from more complex expressions (which yours is not!) because of the little "surprises" like this that the BDE throws at you.
Perhaps adding parentheses:
where (fieldone = :fieldone)
and (fieldtwo = :fieldtwo)
Or, single or double quote signs (this probably will make it worse?)
where (fieldon = ":fieldone")
and (fieldtwo = ":fieldtwo")
Or, to explore the problem, remove the "and fieldtwo = :fieldtwo" line and see if it runs.
Would it be possible for you to do your own parameter substitution with a StringReplace as in
Query1.SQL.Text := StringReplace(Query1.SQL.Text, ":fieldone", "MyVarName",[rfReplaceAll ]);
If you are creating a ClienDataSet in memory by the Create DataSet method, you should check the TFieldDefs property, which must have a different field name or not created
I was having a weird but small problem, I'll post in case it will help someone in some day.
uRegPeople.pas
with frmEditPerson do
begin
PersonID := qryPerson.FieldByName(ID).AsInteger;
...
end;
I had qryPerson both in frmRegPeople and in frmEditPerson, by using with I was referencing to frmEditPerson.qryPerson, however I wanted to reference to frmRegPeople.qryPerson. Then I need to change to the following code.
with frmEditPerson do
begin
PersonID := Self.qryPerson.FieldByName(ID).AsInteger;
...
end;
// Explanation
// qryPerson --> frmEditPerson.qryPerson;
// Self.qryPerson --> frmRegPeople.qryPerson;