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QUESTION
I have a table named "k3_order" with jsonb column "json_delivery".
Example content of that column is:
...ANSWER
Answered 2021-Jun-08 at 14:59Indexes can only be used by queries in the following cases:
the
WHERE
condition contains an expression of the forman index has been created on
is an operator in the index family of the operator class of the index
is an expression that stays constant for the duration of the index scan
the
ORDER BY
clause has the same or the exact opposite ordering as the index definition, and the index access method supports sorting (from v13 on, an index can also be used if it contains the starting columns of theORDER BY
clause)the PostgreSQL version is v12 and higher, and the
WHERE
condition contains an expression of the formbool_func(...)
, where the function returnsboolean
and has a planner support function.
Now json_delivery->'packageNumbers' ? '0000000596034Q'
satisfies the first condition, so an index scan can be used.
jsonb_exists(json_delivery->'packageNumbers', > '0000000596034Q')
could only use an index if there were a planner support function for jsonb_exists
, but there is none:
QUESTION
I have a json file:
...ANSWER
Answered 2021-Jun-06 at 20:06for each data in the array (map) you want the ingredient part (.ingredients), extract the keys (Object.keys) and flatten the array (.flat())
QUESTION
I'm trying to write a "Binder" middleware that will validate any request query using a struct type with gin bindings/validators
So for example, let's say I have an endpoint group called /api/subject
which requires the query string to have a subject code and an ID that will be validated using the following struct (called entity.Subject
):
ANSWER
Answered 2021-Jun-06 at 22:00I managed to do something similar!
I created the following middleware
QUESTION
I am trying to do a simple golang with gin post and get request, every other thing works just fine, apart from the part that the values that are supposed to be in the struct variables are empty, the example is bellow if i didnt explain well my code(main)
...ANSWER
Answered 2021-Jun-03 at 07:54you need to capitalise the first character of values inside struct field.
For Example:
QUESTION
I am trying to learn a custom environment using the TFAgents package. I am following the Hands-on-ML book (Code in colab see cell 129). My aim is to use DQN agent on a custom-written grid world environment.
Grid-World environment:
...ANSWER
Answered 2021-Jun-02 at 22:36You cannot use TensorSpec
with PyEnvironment
class objects, this is why your attempted solution does not work. A simple fix should be to use the original code
QUESTION
I am trying to write a proxy for my api and frontend using Golang and gin. If the request goes to anything except "/api" I want to proxy to svelte server. If goes the "/api/something" I want to handle it in gin. Currently my code is like this.
...ANSWER
Answered 2021-Jun-02 at 12:06You can mv proxy func in r.NoRoute
r.NoRoute(proxy)
QUESTION
I am confused with classes in Haskell as follows.
I can define a function that takes an Integral argument, and successfully supply it with a Num argument:
...ANSWER
Answered 2021-May-28 at 12:33The first two examples don't actually have anything to do with the relationship between Num
and Integral
.
Take a look at the type of gin
and fni
. Let's do it together:
QUESTION
I'm trying to send events from my mobile application to Google analytics.
External library connected:
com-google-android-gms.play-services-analytics-impl.16.0.8.jar
Androidapi.JNI.PlayServices
After launching the application, I get the following.
...ANSWER
Answered 2021-Apr-23 at 13:32After digging around in the documentation. GoogleAnalytics I found this.
This code is used for universal analytics not GA4 so if you are trying to use this to send data to GA4 its not going to work.
QUESTION
On PostgreSQL 13, I have a table define as such :
...ANSWER
Answered 2021-May-19 at 16:20I would not use a generated column at all, but define the index on an expression:
QUESTION
Hi I've been trying to mock a gin.Context but I have not been able to make it work I was trying what they did in this solution but it does not work with my router this is the error I have been getting
r.POST("/urls", urlRepo.CreateUrl)
cannot use urlRepo.CreateUrl (value of type func(c controllers.Icontext)) as gin.HandlerFunc value in argument to r.POSTcompilerIncompatibleAssign
This is the interface I created to later mock and the method in which I will be testing
...ANSWER
Answered 2021-May-12 at 19:04if you are using gin-gonic
as your http router, the param for your entry point should be a *gin.Context
.
So, for instance, you should be replacing this:
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