I am a beginner in swift language (for IOS) and I am going to use sqlite in my program.
I added the libsqlit3.dylib to my project and used bridging-header. (the wrapper is downloadded from : https://github.com/chrismsimpson/SwiftSQLite)
I have run the following code :
var db = SQLiteDatabase();
db.open("test.db");
var statement = SQLiteStatement(database: db);
var sql = "CREATE TABLE IF NOT EXISTS CONTACTS (ID INTEGER PRIMARY KEY AUTOINCREMENT, NAME TEXT, ADDRESS TEXT, PHONE TEXT)"
println("result : \(statement.prepare(sql))");
the result code is 21 which means "Library used incorrectly".
the test.db file doesn't exist and expect it will be created.
I dont know what is the problem! please help me.
It seems the problem is because of the "test.db" dosent exists.
Now the question is how can I create the "test.db" file. Why the swift dosnt create the database file when the file doesnt exist?
I intentionally left this part simple, because it's likely people want to have their own logic with regards to CRUD operations around the database file itself.
But, for the sake of completeness I've added some more boilerplate code to take care of this all for you. Please read the README on the github page, but suffice it to say, if you do everything as described, now calling SQLiteDatabase.sharedInstance will automagically create a new database if one doesn't exist already. You'd use this as follows:
var statement = SQLiteStatement(database: SQLiteDatabase.sharedInstance)
Related
I search many times in Google, SO, and I can't find anything about working with attachment via delphi, so I decide to write this question.
I have a table in .accdb database called Files with those fields:
IDFile PK AutoIncField,
FileName WideStringField,
FilesAttached WideMemoFiled.
How can I save/load files to/from attachment fields using delphi?
Attach files and graphics to the records in your database
The problem here, in delphi the datatype of FilesAttached is TWideMemoField,
when I write ShowMessage(FDTable1FilesAttached.Value); it give just the name of the attachment.
I don't know how to Insert/save files to/from that field using delphi.
It didn't seem that hard to find VBA/C# examples of working with .accdb Attachment fields which should translate fairly easily into Delphi. However, it turned out to be more difficult than I imagined to find something that a) hadn't misunderstood what Attachment fields actually are and b) actually works. Skip to the update section below.
For example, googling
accdb create attachment in vba
gives numerous hits including this one
http://sourcedaddy.com/ms-access/working-with-attachment-fields.html
which you might try as a starting point. It uses MS DAO objects, and includes straightforward code for storing files to Attachment fields and for accessing them. You would need to create a Delphi wrapper unit for the DAO type library, if you don't already have one, using the IDE's Import Type Library
If you would prefer something ADO-based, you might take a look at
https://www.codeproject.com/Questions/843001/Handling-fields-of-Attachment-type-in-MS-Access-us
Update See the function OpenFirstAttachmentAsTempFile in the post by "aspen" (date = 4/11/2012 07:18 am) in this thread
https://access-programmers.co.uk/forums/showthread.php?t=224112&page=2
which shows an apparently successful attempt to extract a file from an attachment field (the thread also contains several other attempts at coding this function).
Note in particular this line
Set rstChild = rstCurrent.Fields(strFieldName).Value ' the .Value for a complex field returns the underlying recordset
which implies that the Value of the attachment field can return a recordset which contains the attached file(s).
Presumably, importing a recent version of the DAO type library into Delphi would allow
a Delphi app to do the same thing, and then one could reverse-engineer the rstChild recordset to see how to populate this field in code. I haven't done that yet, though.
I'm trying to save data to a Parse database from a Google Apps Script function. I attempted to use the ParseDB library (https://script.google.com/macros/library/d/MxhsVzdWH6ZQMWWeAA9tObPxhMjh3Sh48/12), but I can't seem to get it working. It seems like I'm not accessing the ParseDBInstance correctly:
function onFormSubmit(e) {
// e.namedValues is an object containing question fields associated with lists of responses
var db = getMyDb('redacted',
'redacted',
'response');
Logger.log(db);
db.save({
test: 'a_string'
});
}
I can't find anything online indicating how I'm supposed to be doing this...and I feel like I'm just doing something dumb (pretty new to apps script/javascript in general/parse).
Any suggestions would be much appreciated!
You need to click 'resources > libraries" then use the key "MxhsVzdWH6ZQMWWeAA9tObPxhMjh3Sh48"
You can then use the library by calling ParseDb.getMyDb(applicationId, restApiKey, class)
I have a table called settings, when I would change or enter data into the form it did not change the data in the table. In addition on form an image upload file is not running, There may be the wrong code below.
(Solved by me)
Maybe someone can help me Related to this.
What you are doing here is tottaly in secure and your data can be hacked / manipulate really fast.
Why dont you use a framework like codeignighter there are about 100 easy frameworks that will help you manage database a lot easyer.
Are you sure that you are updating the wrond ID? where id = 1, seems to be not dynamic.
Please post your error http://www.w3schools.com/php/func_mysql_error.asp
I know it is not so related to your question, but you should see these light frameworks:
http://kohanaframework.org/
https://github.com/ElbertF/Swiftlet
http://ellislab.com/codeigniter
You're not checking the return status of of your query, so if it's not working you wouldn't know. Do this:
mysql_query("UPDATE settings SET site='$name',keywords='$keys',descrp='$desc',email='$email',fbpage='$fbpage',twitter='$twitter',gplus='$gplus',disclaimer='$disclaimer',template='$template' WHERE id=1")
or die(mysql_error());
Note: mysql_*() is deprecated: you shouldn't use it. Use mysqli_*() or PDO instead.
Also: You are susceptible to an SQL Injection attack. You should escape your input variables with mysql_real_escape_string() (or the equivalent if you switch to mysqli), or consider moving to prepared statements.
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;
Seems my appreciation for the Entity Framework is taking a serious hit. The "MS almost got it right, but they just missed it because of something L-A-M-E" thought is coming up. Until today everything has been fine. For some unknown reason, it won't compile anymore with Error 2048. I've read up on this and I've seen how you need to map all three operations. Why is this even necessary? What I if I don't need a delete function and only need insert and update? I tried mapping a dummy SP to my delete function. If that fixes my problem, however cheezy, fine. Only problem is, it just created more problems.
Here's what I have. I'm writing a simple newsletter app in MVC. I have entities for a publication, issue and article all generated from my DB (SQL 08). I set up the the relationships in my DB and they translated fine to my EDMX. I made some SPs to insert and update my issues and article. I added them to the EDMX and mapped them accordingly. I don't need a delete function for any of them and I don't need anything for the publication entity. Why is the compiler forcing me to map all functions? IMO, this a MAJOR, MAJOR PROBLEM with EF4 and I can't believe MS would release it with this kind of crap coming up.
The other strange issue is I've tried mapping sp's to entities in another project and configured with only insert and update and they compile fine. Why is the compiler inconsistent?
I would rather not resort to having to use the Imported Functions. Is that my only option? If that's the case it eliminates the ability to the SaveChanges method. Come On MS!!! Fix this!!!!!!!
After much digging and side by side text comparison, I think I have found the solution.
The SP in question was set up like
CREATE PROCEDURE updateArticle
(
#ArticleID INT,
#Content TEXT
)
where it should have been something like
CREATE PROCEDURE updateArticle
(
#ArticleID INT,
#IssueID INT,
#Content TEXT
)
Now, I still don't know why EF4 even requires this since I'm not updating the issueid and the error message lends little help in diagnosing the problem. My SP doesn't even use the IssueID, but EF needs it regardless. Hopefully this will help someone down the road. MS still could do a better job regarding the need for this.