rein | Database constraints made easy for ActiveRecord | Database library
kandi X-RAY | rein Summary
kandi X-RAY | rein Summary
The table below summarises the constraint operations provided by Rein and whether they support validation.
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Quality
Security
License
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Top functions reviewed by kandi - BETA
- Create a new schema .
- Drop all schemas
- Create a view .
- Drop all views in a directory
- Creates a new schema .
- Drop a schema .
- Execute a given view
- Drop a view .
rein Key Features
rein Examples and Code Snippets
Community Discussions
Trending Discussions on rein
QUESTION
I'm a beginner in python so I have this program where it classifies tweets into different categories (sport,sante, culture...) using keywords and I would like to copy-paste every line of the JSON file that belongs to a certain category into a file named text1 and I did the following : but I guess I did it the wrong way since I keep receiving the same error please any suggestion on how to solve this problem!
...ANSWER
Answered 2021-Jun-06 at 22:54This might be a very simple case of fixing the encoding.
Your error says:
QUESTION
I try to connect with an FTP server with apache-commons-net-3.7.2 (implicit TLS, double factor authentication with client cert + login/password).
I can authenticate myself, enter in passive mode, but the client doesn't succeed in connecting to the server in order to get data by the data socket.
I can connect myself, on the same computer, with WinSCP (same settings). I have activated WinSCP logs to see protocol details, and I have adjusted my source code with the same options. I can verify that my protocol is ok with a ProtocolCommandListener
. I know that passive mode is required because WinSCP emits PASV
command.
I can see that WinSCP connects to the data socket on port 62564 (I have replaced FTP IP address with XXX)
...ANSWER
Answered 2021-Jun-01 at 06:26Your assumption is wrong. You do not set the port. The server tells you what port to connect to.
For WinSCP:
2021-01-06 10:25:35.575 227 Entering Passive Mode (192,168,4,122,244,100).
...
2021-01-06 10:25:35.575 Connexion à 83.XXX.XXX.XXX:62564...
Where 62564 = (244 << 8) + 100
See RFC 959, section 4.1.2. Transfer parameter commands, Page 28.
The parsing of the PASV
response fails, because you are using a wrong code. The _parseExtendedPassiveModeReply
is for EPSV
. For PASV
, use _parsePassiveModeReply
. There you will also see the implementation of the above formula:
QUESTION
Im new to React-Native and currently building a chat-function into my app. To visualize the chat Im using a FlatList (before I used Scrollview but with FlatList I have better performance with multiple items), netherless I have two big problems.
- As I write more chatmessages more and more messages are getting appended to my chatmessages hook. One message is not a problem, but after 2 or 3 the whole FlatList starts to blink and reload. This gets worse if I append even more messages.
- When I send more then 3 Messages to the Database, and they get downloaded by the firestore listener to my FlatList, those items arent even properly rendered into my FlatList. I use concat to add them at the end of my chatmessages state but FlatList displays them at the beginning of the whole chat! After that it blinks, and the new message drops one item lower, it blinks again and it drops lower, and this happens so long until the new message finally dropped to the end of the whole chat where it should be. It doesnt make sense at all because I use concat, so the new chatmessages are at the end of my whole chatmessages array, why is FlatList(and also Scrollview) adding them at the beginning and rerendering as much as they need to drop it to the bottom??
My Code looks like this:
...ANSWER
Answered 2021-May-07 at 16:03A key issue here is with your useEffect(() => loadnewmessages())
. This is causing you a major performance overhead.
useEffect
is a hook that has 2 parameters:
- a "callback" - a function that will be run whenever the conditions (see #2)are met
- dependency condition - one of 3 values:
null
(or omitted entirely) - the callback is run EVERY TIME the component renders[]
(the empty array) - the callback is run only once when the component is first "mounted"[var1, var2, .....]
- the callback is run if, each time the component is renders, any of the vars in the array has a different value than the last time the component rendered
In your case, you are fetching data from Firestore EVERY SINGLE TIME that the component renders.
Worse - each time your component renders you are using an onSnapshot()
call meaning that you are creating a NEW realtime listener for data changes from that query every single time your component renders. After 1 render, you'll have a single listener. After you component renders a second time, you'll have 2 realtime listeners - each running the exact same Firestore query and listening for changes coming from Firestore. After 3 renders, you have 3 realtime listeners ...
Worse again - your realtime listener(s) get data from Firestore and update state. Updating state causes your component to re-render. See previous paragraph(!!!)
I recommend you look at how React's useEffect should be used in conjunction with Firestore realtime listeners. In particular, how to subscribe & unsubscribe to the listeners. Look for the word "unsubscribe" in this article for an example of useEffect()
with Firestore (the section entitled "Streaming data in real time from Firestore as a side effect")
QUESTION
I have started learning Python's
SpaCy
lib or NLP a few days ago.
I want to create Rule-based matching for detecting street addresses.
This is the example of street names:
ANSWER
Answered 2021-Mar-27 at 07:41Here's a very simple example that matches just things like "*strasse [number]":
QUESTION
I'm working on DOM Playground, where I'm editing the page's style strictly using Javascript (I know its inefficient – its for an assignment). DOM Playground
For the most part, I'm almost done. I just need to add list elements in the unordered list that is commented (I'll share the code below). There is an array called resources, which holds five objects with the following properties – title, href, and innerHTML.
I'm trying to create a forEach function, that runs through the resources list, and inserts a list item (li) with the same href, title, and innerHTML as the objects in the array. So for example, resources[0] =
...ANSWER
Answered 2021-Mar-05 at 21:04If your resource list is an array of objects, using the same object form as given in your example, this code snippet should give you what you need,
QUESTION
I try to connect with a FTP server with apache-commons-net-3.7.2 (implicit TLS, double factor authentication with client cert + login/password).
I can authenticate myself, enter in passive mode, but the client doesn't succeed in connecting to the server in order to get data by the data socket.
I can connect myself, on the same computer, with WinSCP (same settings), I have activated WinSCP logs to see protocol details, and I have adjusted my source code with the same options. I can verify that my protocol is OK with a ProtocolCommandListener.
WinSCP logs are below
Connect and browse root directory
Chiffrement : Chiffrement SSL/TLS implicite
Version min TLS/SSL : TLS 1.0
Version max TLS/SSL : TLS 1.2
Réutiliser l'ID de session TLS/SL pour le connexions de données activé
(reuse ssl session id for data connexions activated)
I use the same certificate as for my Java (PFX format with WinSCP, JCEKS for Java, which is Java 8)
...ANSWER
Answered 2021-Jan-07 at 21:02Thanks to Martin Prikryl
There was two problems :
- apache-commons-net doesn't manage ssl session reuse. There are some hacks documented (see comments)
- don't call sendCommand("xxx") but use api verbs (eg. execProt, not sendCommand"PROT", or enterLocalPassiveMode, not sendCommand("PASV")
QUESTION
I'm looking for a code that would let me send an random embed that I created when someone types a command. For the moment with the code that I have, all embeds are being sent but I want the bot to only send a random one, not all 4. Is this possible ?
...ANSWER
Answered 2021-Jan-08 at 00:15Yes this is possible and very simple to do:
QUESTION
So I'm currently trying to find the similarities of a given number of words. For that I wanted to get the content of the corresponding Wikipedia pages and search for words that all these pages have in common (minus of course words like articles and so on).
I am searching on the German Wikipedia page and one of the words is "Rhein" (the river Rhine). But for some reason, wikipedia.page("Rhein") gives me the disambiguation page for "rein". wikipedia.search("Rhein") shows the correct pages, but .page() or .content() do not.
Any explanation for this?
...ANSWER
Answered 2020-Dec-11 at 15:35There is a bug in the wikipedia package. If you call wikipedia.page("Rhein")
, it first checks if it can find alternative spellings. For "Rhein" it finds "Rein" and then returns you the result for "Rein".
Looking for alternative spellings is a nice option, but it would be better if it is only enabled when no results are found for the original spelling.
You can avoid this issue by writing:
QUESTION
Making a shell script work in AppleScript.
The following works in Terminal:
...ANSWER
Answered 2020-Nov-10 at 00:06Looking at a portion of the error message:
unexpected EOF while looking for matching `\"'
It is referring to the field separator assigned by: -F
You need to, in this case, both single-quote and escape the single double-quote.
QUESTION
My Widget loads some data from UserDefaults/ Appgroups
and depending on that it shows some text and a picture.
This works with the first start.
If I change the UserDefaults and use WidgetCenter.shared.reloadAllTimelines()
it only changes the picture not the text.
What can I do? Are there other options to share data between main app and widget? Seems to be a bug.
This is my Widgetentry:
...ANSWER
Answered 2020-Oct-16 at 16:42It looks like you correctly read logo
and mannschaftsName
values from App Group UserDefaults:
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