I have a Node-RED flow. It uses a sqlite node. I am using node-red-node-sqlite. My OS is Windows 10.
My sql database is configured just with name "db" :
My question is, where is located the sqlite database file?
I already search in the following places, but didn't found:
C:\Users\user\AppData\Roaming\npm\node_modules\node-red
C:\Users\user\.node-red
Thanks in advance.
Edit
I am also using pm2 with pm2-windows-service to start Node-RED.
If you don't specify a full path to the file in the Database field it will create the file in the current working directory for the process, which will be where you ran either node-red or npm start.
Use full path location with file name.
It should work i guess.
This isn't a valid answer, just a workaround for those who have the same problem.
I could't find my database file. But inside Node-RED everything worked just great. So. this is what I have done as a workaround:
In Node-RED, make some select nodes to get all data from tables
Store the tables values somewhere (in a .txt file or something like that)
Create your database outside Node-RED, somewhere like c:\sqlite\db.db. Check read/write permissions
Create the tables and insert the values stored from old database
In Node-RED, inside "Database", put the complete path of the database. For example, c:\sqlite\db.db
In my case this was easy because I only had two database with less than 10 rows.
Hope this can help others.
Anyway, still waiting for a valid answer :)
Related
I deployed a sample.s3db SqLite to my Delphi android project.
set folder to:
fdconnection1.params.Database := system.ioutils.TPath.Combine( system.ioutils.TPath.GetDocumentsPath, 'sample.s3db');
in FDConnection1BeforeConnect event.
in Project-Deployment, set folder to assets\internal\ for Android
However, when I run the app, apparently it can find the physical file, but it says my tablename "Customers" is not found.
so in the BeforeConnect code, if I add a CREATE TABLE SQL create code if not exists, then everything works well but of course the table is empty (whereas my deployed sample.s3db is not empty) ... which proves the FILE sample.s3db was found and not corrupted, but somehow the Table was not found.
Even tried to change in BeforeConnect
FDConnection1.Params.Values['OpenMode'] := 'ReadWrite';
but it still doesn't work.
Any ideas the table name does not work?
I tried to change table name to all caps, in case Android is case-sensitive but it also does not work.
I recommend deleting your app from the android. This will clear out your data. Otherwise your new sqlite file is not deployed if the file already exists. This could happen for instance if you made an error in the path at one point in time so sqlite just created an empty database.
Your connection string looks correct and so does your destination path. Just to be safe, you may also want to clear out your other values for your connection.
fdConnection1.ConnectionDefName:= '';
In replacement of my previous question which was confusing and poorly formulated, here is the "real" question.
I would like to known how to set, with Firedac, at runtime, a relative path to a sqlite database located in a subfolder of my application folder.
As Jerry Dodge stated :
Any application should never rely on writable data in the same directory anyway. Also, even if you did, you should make sure all your paths are relative to the application at least.
At the moment, the application I have in mind is portable and I would like the database file to be stored in a sub-folder of the main exe folder.
On the Form.Create event of my main form, is used first
path := ExtractFilePath(Application.ExeName);
And in then for FDConnection :
with FDConnection1 do begin
Close;
with Params do begin
Clear;
Add('DriverID=SQLite');
Add('Database='+path+'Data\sqlite.db');
end;
Open;
end;
I keep on getting an error saying "unable to open database file".
I don't want to set the path to the database file in the FiredDac Connection Editor because then it would be absolute and bound to my machine, right ?
How could I set this path to the database file so that it would work in any configuration, wherever the user puts the application folder ?
Thank you all in advance
Math
As I found my own solution, I decided to post it here for future users who might encounter the same problem (that is to say a Delphi beginner level and the need to link a database file relative to their project exe file).
FIRST STEP was to add a data module to the project. This was done by going to File -> New -> Other -> Delphi Files -> Data Module
SECOND STEP Once the data module added to the project, as my main Application Form makes a call to the database on creation, I had to make sure the Data Module was created first. To achive that, I went to Project -> Options -> Forms and dragged the datamodule in first position of the list of auto created Forms
THIRD STEP was to drop a FDConnection on the datamodule and set all parameters EXCEPT database file.
FOURTH STEP was to add an OnCreate event to the datamodule, to specify the path to the database relative to the application exe and connect. It was done like this :
procedure TDataModule1.DataModuleCreate(Sender: TObject);
begin
path := ExtractFilePath(ParamStr(0));
FDConnection.Params.Add('Database='+path+'Database\sqlite.db');
FDConnection.Connected := True;
end;
FIFTH AND FINAL STEP was to add the datamodule to the uses clause of all other units that needed a connection to the database.
I realize that this solution is far from perfect and that, as very experienced users already stated, storing the database in the same folder (or a sub-folder) as the main application Exe is not a good solution.
Also, I decided to connect to the database on DataModule creation, but another solution could be to connect on demand before triggering the queries and then disconnect. That's up to you and your needs
Thanks to all for your help, tips and advises
Math
PS : please notice I did not check my answer as accepted as the best answer, would not be fair right :-)
Introduction
IMHO
Database path and server name should not be hardcoded in applivcation.
Why ?
When you work on a project, you need to do many things on database connection, setting datasets, query etc. Usualy this is done on working database. Then server name and database path are different from those of the real database.
You should be able to set up server name and path to database easy and without to compile the project. This allows to set properly database connection params on a random computer.
Solution :
Setup the database connection component on design time, do not create it in runtime. Setup all parameters including server name , database path, charset etc. to your working copy of database. This will allow you to set up the other components associated with this database on design time.
(In your answer I see you have done almost the same.)
Save server name, database path and any other parameter you want, to an exterrnal resource, ini file, windows registry or something else. Then get these parameters when application started or before connect to database.
In your case, you use local server and the same path as application, so you don't need to store nothing.
Regarding the question
The code :
with FDConnection1 do begin
Close;
with Params do begin
Clear; <-- this removes all parameters
Add('DriverID=SQLite');
Add('Database='+path+'Data\sqlite.db');
end;
Open;
end;
removes all other parameters except DriverID and Database. Probably the error arise from that.
If you already setting all parameters in FDConnection:
Do not use:
FDConnection.Params.Add('Database='+path+'Data\sqlite.db');
This will add new parameter with the same name, but connection will use the first one.
This explains why everything works in your answer, because you did not set a parameter 'Database' on design time:
THIRD STEP was to drop a FDConnection on the datamodule and set all
parameters EXCEPT database file.
Instead use :
FDConnection.Params.Database := 'Database='+path+'Data\sqlite.db';
You may use this for example in
OnDataModuleCreate or FDConnectionBeforeConnect events
I hope this will be useful.
In android, I couldn't compile with fdConnection opened in design time, then certify it's closed. Your first line didn't work for me, but about takes the goal:
using following expression, it works for me:
FdConnection1.Params.Values['Database'] := GetHomePath
+ PathDelim + 'sqlite.db';
Look that I didn't use subfolder 'Data'. You can try simple first.
If your resources are light and read-olny for end-user, you could pack them direct into exe file. This would give you really portable application, which your user can run from arbitrary place, even from usb flash.
Go to Project->Resources and Images menu, add there you files.
You can access them in runtime with TStream:
var
s: TStream;
{.....}
s:=TResourceStream.Create(hinstance, 'myfile_1', RT_RCDATA);
Some resources you can handle direct in memory. As for sqlite database, you could copy it from app resources to user's documents path:
MyAppPath := Tpath.GetDocumentsPath+'\MyAppName'; // you need System.IOUtils in uses
If not DirectoryExists(MyAppPath) then CreateDir(MyAppPath);
MyDBPath := MyAppPath+'\Data\sqlite.db';
If not FileExists(MyDBPath) then begin
FL:=TFileStream.Create(MyDBPath ,fmCreate);
FL.CopyFrom(s,0); // this will copy your db into 'sqlite.db' file
end;
I am creating web service in zend framework which uses DynamoDB. So I installed DynamoDB in local. But it's not easy to use. Even for inserting data and update any data for testing for purpose I have to write a script.
Is there any DynamoDB client available for MAC ? In which we can insert/update/delete data from UI.
EDIT
Doubts
1) Do I have to run a SQL to see table data? I thought there would be GUI for this.
2) I am not able to use where clause in SQL. What if I want to see one or two records from all? Is there a way to use conditions in this?
3) All fields of a row is not visible and I am not able to scroll it horizontally ?
YES! I've finally found a solution after struggling with this myself:
Run your local dynamodb jar with the following command java -jar DynamoDBLocal.jar -dbPath . [this will create a file in whatever directory the Dynamo jar is located in].
Download SQLite Database Browser and extract/install it.
Start SQLite Database Browser
Navigate to "Open Database" from the file menu
Navigate to the directory from 1. Select the file [in this case, ****_us-east-1]
You should then see the database contents!!
Hope this helps - it's been frustrating me no end!
!! EDIT !! - in response to original question edit.
Doubts
1) Do I have to run a SQL to see table data? I thought there would be
GUI for this.
2) I am not able to use where clause in SQL. What if I want to see one
or two records from all? Is there a way to use conditions in this?
3) All fields of a row is not visible and I am not able to scroll it
horizontally ?
Yes - you can do a simple "select" statement, for instance in my examples: "SELECT * FROM tweet_item" returns me the following screenshot:
Seemingly inadvertanyl - whilst I couldn't get the direct SELECT * FROM XX WHERE XX to work, the like statement does. For instance SELECT * FROM tweet_item where tweet_item.hashKey like "%425665354447462400%" returns me the tweet with tweet_id [my hashKey] of 425665354447462400:
Strange - I seem to be able to scroll quite happily [although it is Windows not Mac]. It also automatically tries to re-size the outer frame, too.
I ran into this problem and found a relatively new solution : https://github.com/aaronshaf/dynamodb-admin
It has provision for GET/POST/PUT/DELETE.
Although its a paid product, which is a bummer, RazorSQL now supports DynamoDB as well, and does let you change the AWS endpoint to point to a local installation.
The mac version (with a free trial) is available here:
http://razorsql.com/download_mac.html
Here is a very useful ui tool https://github.com/YoyaTeam/dynamodb-manager，It supports almost all data operations。
For Eclipse users:
Amazon provides AWS Toolkit for Eclipse IDE. It can view local and cloud databases. Also if you are using different regions, it has ability to choose from different regions.
You can create attributes, add keys etc..
For installation follow this link: http://docs.aws.amazon.com/toolkit-for-eclipse/v1/user-guide/getting-started.html
Dynobase is new DynamoDB GUI Client which also lets you browse and manipulate local DynamoDB instances: https://dynobase.dev/dynamodb-local-admin-gui/
Unfortunately, it's paid but there's free 7-days trial, works on Mac, Windows and Linux: https://dynobase.dev/
I am working on a firm application in which I need to create a local database on my device.
I create my local database through create statement[ It works well]
Then I use that file and perform insert operation through fire-fox sqlite plugin, I need to insert aprox 2000 rows at a time so I can not use code. I just run insert manually through sqlite plugin in fir-fox.
After that I just use that file in my place of my local database.
When I run select query through my code, It show Exception:java.lang.Exception: Exception: In create or prepare statement in DBnet.rim.device.api.database.DatabaseException: SELECT distinct productline FROM T_Electrical ORDER BY productline: file is encrypted or is not a database
I got the solution of this problem, I was doing a silly mistake by creating a file manually by right click in my RES folder, that is not correct. We need to create the database completely from SQlite plugin, then it will work fine. "Create data base from SQLITE(FIle too) and perform insertion operation from SQLITE, then it will work fine"
This is very rare problem, but i think it might be helpful for someone like me....!:)
You should check to see if there is a version problem between the SQLite used by your Firefox installation and that on the BlackBerry. I think I had the same error when I tried to build a database file with SQLite version 2.
You also shouldn't need to create the database file on the device. To create large tables I use a Ubuntu machine and the sqlite3 command line. Create the file, create the tables, insert the data and build indexes. Then I just copy the file onto the device in the proper directory.
For me it was a simple thing. One password was set to that db. I just used it and prolem got solved.
Everything I have read so far, it seems as though you copy the DB from assets to a "working directory" before it is used. If I have an existing SQLite DB I put it in assets. Then I have to copy it before it is used.
Does anyone know why this is the case?
I can see a possible application to that, where one doesn't want to accidentally corrupt database during write. But in that case, one would have to move database back when it's done working on it, otherwise, next time program is run will start from "default" database state.
That might be another use case - you might always want to start program execution with known data state. Previous state might be set from external application.
Thanks everyone for your ideas.
I think what I might have figured out is that the install cannot put a DB directly to the /data directory.
In Eclipse there is no /data which is where most of the discussions I have read say to put it.
This is one of the several I found:
http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/comment-page-4/#comment-37008