nandi | Fear free PostgreSQL migrations for Rails | Data Migration library
kandi X-RAY | nandi Summary
kandi X-RAY | nandi Summary
Friendly Postgres migrations for people who don't want to take down their database to add a column!.
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Top functions reviewed by kandi - BETA
- Checks if all migrations are applied
- Checks that the migrations are removed .
- Ensure that the given migrations exist
- Compile all migrations files
- Verify that the migrations are validations of the migrations
- Ensure that the given migrations are installed .
- Match the timestamp for a given timestamp
- Formats a value .
- Initialize the spec .
- adds nulls to the table
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Trending Discussions on nandi
QUESTION
I have a search screen where users can search for a county and a list of vaccination posts in said county is shown. Some counties have many some have very few.
In the list of vaccination posts, there is a button that when pressed, the button is disabled. All is good until here, but when I re-search the same county, the button that was once disabled is no longer disabled, meaning it can be pressed again. I would like to avoid that.
I have a list of bools, "true" for each vaccination post. When button is pressed, respective index in the list is changed to "false" thus disabling the button.
Question: How can I keep the button disable? (Whether the same county is re-searched or the app is re-opened)
...ANSWER
Answered 2021-Dec-30 at 11:48I did that this way: use the provider to set value, make boolean value
QUESTION
Currently building my first app. Getting data from firebase. Purpose is to hopefully get more people to get the COVID vaccine in Kenya.
Explanation of the code below: A user will use the search function to search for a specific county, then all vaccination posts in that county will show up with the relevant data. There are also 2 buttons, yes and no. Users can vote to let other users know if a vaccination post is still administering vaccines or not. Also, when button is pressed, they should get disabled.
I have a list that buttonPressed that when called, x number of "true" is added depending on the number of vaccination posts available. They are linked together using their index's.
Problem is after adding the buttons, I am getting an "Out of Memory" error.
Without the buttons, it runs as intended. Buttons are important because some vaccination posts are still operational while others are not.
Question:
1 - How can I get passed "Out of Memory" error?
Code:
...ANSWER
Answered 2021-Dec-27 at 10:28QUESTION
I am getting a list from Firebase. The list loads as expected, However I have two issues.
1 - When the button in one item from the list is disabled, all the buttons in the other items also get disabled. I don't want this to happen. How can I get passed this?
2 - I am getting "positiveCount" and "negativeCount" from firebase RTDB. I want to get total (positiveCount + negativeCount) and then calculate the percentage of "positiveCount". (Example: positiveCount = 2, negativeCount = 2, percentage of positiveCount should be 50 percent). The problem is, ıf there is only one item that is loaded, it works perfectly. If there is more than one item loaded, I get an error.
Exception:
...ANSWER
Answered 2021-Nov-29 at 13:47To prevent all buttons to be disabled instead of
QUESTION
I am trying to create a nested json output from a MySql table, and i am struggling to resolve a problem that arises.
An example of the table is shown below:
id county county_code region region_code entrants population 1 Mombasa KE.28 Coast KE.CO 2526 1208333 2 Kwale KE.19 Coast KE.CO 956 86682 18 Nyandarua KE.35 Central KE.CE 1153 638289 19 Nyeri KE.36 Central KE.CE 824 759164 23 Turkana KE-43 Rift Valley KE.RV 183 926976I am trying to create the following output:
...ANSWER
Answered 2021-Jun-23 at 23:25just think about the output of
QUESTION
Can I assign a different indicator to each set of datapoints in the Funnel plot? I am using the metafor package. My data set is an excel sheet imported into R. I have created a column ("EffectType") and given each study a value (1, 2 or 3) referring to a certain effect type. First, I did a meta-analysis and now I want to create a funnel plot with all data points, but be able to distinguish between effect types using different indicators.
...ANSWER
Answered 2020-May-01 at 14:51You were close, pch works. In the metabin() you're defining the variable "byvar", so you just also need to select pch on this variable in the pch= argument of the plot. I'm not sure which class "byvar" is, but as.numeric(as.factor(m1$byvar)) should be robust. Example:
QUESTION
i have a problem with raw socket packet.
Based on Vivek Ramachandran and Sukumar Nandi's idea(https://www.researchgate.net/publication/221160823_Detecting_ARP_Spoofing_An_Active_Technique) i'm trying to create a TCP SYN packet to check if the host that send the ARP response is real and the ARP was not spoofed.
I worte this code in C to send a TCP SYN packet when an ARP reply is recived but, unfortunately, on wireshark the TCP and IP checksum is not valid.
I tryed to figure out why the checksum was not valid without success, this is the code (please don't judge me...it's my first program):
...ANSWER
Answered 2020-Apr-20 at 06:06You are passing the entire frame/packet to the arp_checksum function. Look at the two lines where you call arp_checksum. The first argument should not be send buffer, but the offset of the relevant header in the send buffer, since otherwise you would be including the ethernet header in the calculation. You should probably use iph and tcph (respectively) there instead.
QUESTION
trying to build Docker on my Mac. On Windows I did the same thing and it worked perfectly. But on Mac, I am getting this issue. I have tried "docker build --add-host=docker:10.180.0.1 . " to fix this but I am not quite sure why this thing is happening. since I am new in docker, maybe on Mac it needs some other setting than Windows. I also tried to run from root user, but failed.
...ANSWER
Answered 2020-Feb-09 at 19:54Check if this file exists known_hosts in your codebase, maybe this file is ignored by .gitignore or .dockerignore your docker build is not working because it can't copy this file also check the permission of this file on mac.
QUESTION
I'm trying to make a map of Kenya with a fill that constitutes of values '0-3' and '5'. However, ggplot is plotting the counties with a '0' fill as blank and shifting the values on the scale, because there is no value '4'. How can I fix this? In the way that the zeros are plotted and the scale stays correct. Below is the code I used to make the plot. And also the code that I used to make the dataframe for the plot.
Let me know if you want me to add something and thanks in advance!
These are the first 10 rows of my dataframe:
...ANSWER
Answered 2020-Feb-04 at 18:44There's two problems, so if the factor does not exist at all, even if you use drop=FALSE inside scale_fill_brewer, it will not show up. You have NAs in your counts, and that will be drawn in filling. With the missing factor, it just shifts every into what you see.
Below is a reproducible example:
QUESTION
I've a huge list of counties and want to implement an auto complete feature.
I'm using the same form to add a new customer or update an existing customer.
Now, the problem is that for adding a new customer, my program works perfectly, but when I updates it, in county dropdown list it show the countyId instead of name.
How do achieve that ?
see the images in order
county schema is as
...ANSWER
Answered 2020-Jan-20 at 18:35If you feed the autocomplete an id, that is what it will show. In your first image where you say it works, it looks like it works, but in fact it is not storing the countyId when a choice is made, but the name property which you have set as value. I would assume that it is actually the id you want stored there too.
The cleanest solution in my opinion, is to actually store the whole county object. So I would suggest the following:
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