In .net core microservices, another team works on open source modules, and I extend their modules in my project. I already added one column in a Entity and then same column is added by open source team. Now duplicate column error is showing.
I can not alter open source migration files and my column is already in production.
How to resolve this issue please suggest.
i think we are dealing with multiple smells here.
each microservice should have its own Datarealm
by the sound of it you extended a Table of an object which was generated by the opensource service
But this does not help you, the question is can you merge the Data which is in this column.
If so you might get away with a simple copy/update.
What you need todo is:
Create a new Column With a different Name
Copy your existing Data into the new column
Drop your column
Execute your Migration
Copy your Data back into the column
Test your application very carefully, if the logic which you have implemented for the from you generated Data works as intended
Drop your backup column
Depending on the amount of Data this will lead to a downtime, so plan ahead and have a rollback strategy ready if something goes wrong.
Personal Opinion to Prevent those Smells
Every time i needed an opensource project in my projects in the past i wrote a wrapper around it, this has multiple benefits.
For one if the api of the project changes you only have to update it in exactly one place, which improves the maintainability.
Because it has a wrapper it automatically gets a own Database and if i need to extend an entity which i get from one of those opensource projects, i usually do it via Foreign Keys with a different Table. Which then gets linked via a view.
Yes this costs some performance, but in the end it was worth it every time.
I am new to Xamarin. I have done a couple of smaller projects (2-3 pages, one table). I have a new project that is a great candidate for a shell app. It will have 20 pages, will consume data from a transactional database (cloud hosted) but also have an offline datastore (SQLite). Right now, I just want to get the local version up and running. The template for Shell App generates an IDataService and a MockDataStore. That is a great place to start - but how do I have more than one table? I am a little confused how I would use that. What I would love to see is a template generated shell app that just adds another table (and corresponding list,detail views along with view models. For example, the simple "todo" sample but add a contact table to assign todo tasks to would be perfect. Thanks in advance for your help.
I hope this helps others new to Xamarin. When starting a new project and choosing anything other than the "blank template", the template generates a model (Item) and a services folder containing an Interface (IDataStore) and a MockDataStore. Being new to XAML in general, I spent a lot of time working on getting the UI to look like what I wanted it, learning about Shell navigation and similar topics. Finally it was time to include the data part of my project. Where I got stuck was trying to make sense of the boilerplate code. My understanding of DependencyService was for platform specific code (e.g. Android, iOS) and NOT data service dependency. Further, the templated code is a typed interface (IDataStore). The solution was fundamental - all that interface does is insure CRUD operations are available in whatever you use in a datastore. For me, simply changing IDataStore to not be typed as an Item, solved everything. It allowed me to keep the database layer abstracted away. In my little project, I completed my "MockDataStore" adding additional CRUD operations until I was ready for my real data operations. NOTE: if you generate the WEB API project from the template, it will make more sense - you can flip between your MockDataStore and actual data store.
I have an app that saves your data and retrieves your data under a ID number of your choice! The only thing is I have people asking for an excel document of all there saved data! Does anyone know how I would go ahead with this! I am using Swift and Xcode 6.1! I am also using a SQLite file that core data has made for me.
Thanks,
AppSwiftGB
Creating native Excel is likely a PITA. You should export to CSV, though the format seems to be another PITA for one is liking comma, the other semicolon and the third tabs :-(
I used this blog post as a basis for creating my SQLite tables.
Using the SQL Server Compact/SQLite Toolbox, I can view the created tables nicely.
However, in order to first create the connection in that tool, I had to locate the SQLite database I had created. I did a hard drive search for it, and found it in:
C:\Users\Clay\AppData\Local\Packages\99129e92-ebeb-4800-a0e5-
d0e43b016009_qtyjefqf75sa6\LocalState\photrax.sqlite
Now how in the world would I know that it was in 99129e92-ebeb-4800-a0e5-
d0e43b016009_qtyjefqf75sa6 (there are many similar Welch-looking folder names beneath C:\Users\Clay\AppData\Local\Packages, so how would I know which one it's in)?
Surely there's a more elegant way to find it than doing a global search.
C:\Users\Clay\AppData\Local\Package is where all your apps store their data and 99129e92-ebeb-4800-a0e5-
d0e43b016009 is most likely your package ID from the appx manifest. You can just use ApplicationData.LocalFolder.Path to get the path.
What would be the best approach to replace placeholders in a .docx document (Word 2010) with data coming from a MySQL database?
Can I just open the file using a server side language and do a string replace per each placeholder?
Is there any existing tool/library available?
Thanks
Disclosure: I work for Invantive.
Using Invantive Composition (http://www.invantive.com/products/invantive-composition) you can fill Word documents (letters, legal pleadings, insurancy policies) with data from a database (IBM DB2, Oracle, MySQL, Teradata and SQL Server) and then fully change the contents at will manually. It is intended for real Microsoft Word end-users (both the guys that make the template and the ones that use it) that access the databases through a central webservice and models with queries. Invantive Composition allows nested repeating groups of data and lay-out. Integrates into Microsoft Word using click once.
In the past, I personally have also been using JasperReports (http://community.jaspersoft.com/project/jasperreports-library) to generate letters using the RTF output target of JasperReports. It is free and works fine as long as you do not want to edit the output more than a few words and have Java/SQL development skills. Just as Invantive Composition it works fine for large numbers of different reports.
As long as you can control the environment completely, you can also consider using RTF as intermediate language (not for end-users, only real developers). Save document as RTF, replace parts of the text you need to be replacable, write a webservice that accepts the parameter and dumps back the resulting RTF. Takes some time to generate more complex tables (tables are obviously something invented by the human race after the RTF specification was written :-) This approach only works with very limited number of templates and when you have sufficient developer time available to get it up and running and stabilized.
As an independent reviewer, I have also seen cases where XML templates were used, but the results were not as good as with JasperReports.
**Disclosure: I lead the docx4j project **
There are heaps of existing tools/libraries available!
Yes, you can just do a string replace, but that is a brittle approach, since Word may have split the string across runs.
You can use MERGEFIELDs, or content control data binding.
docx4j supports all three approaches, but content control data binding is the most powerful.
ContentControlsMergeXML
MERGEFIELDs
VariableReplace
One thing to consider especially is "repeats". If you want say a row of a table in Word, for each matching row in your MySQL table, then you need a way to make this happen.
docx4j does this with a "repeat" content control around the table row; whichever solution you choose, I'd make sure up front that it can handle repeats.
If you want to use PHP the most complete available solution is PHPDocX.
You may check in the tutorial how to substitute placeholder variables by data coming from any data source (like a MySQL DB).
In particular, you may populate table rows with an indefinite number of entries and you may delete whole blocks of the Word document depending on the data fed to the application or build dynamical Word charts.
You may check the available DEMO for a simple but quite illustrative example (its inner workings are explained in the tutorial section).
You can use open Open XML SDK and replace your placeholders like this.
Disclosure: I lead the docxgenjs project
I think you shouldn't have to code everything by yourself, that's why I created a Mustache-like templating engine for docx
Demo:
http://javascript-ninja.fr/docxgenjs/examples/demo.html
Repo
https://github.com/edi9999/docxgenjs
It is JS-based and works client and server side.
Yes, you can use server side language to do it.
Check on apache POI.
http://poi.apache.org
Hello I read the above esp the comments and Ivantive looks impressive - but the solution I needed was much simpler. Use Selection.Range.InsertDatabase in Word to fetch records from an access database or excel spreadsheet or even just another word document. With the access solution you can choose the layout of the records to fetch and have it fetch just particular recordds based on a field (eg ID). Google the words above and it'll take you to MS guidance and an example VB script. Worked well in just a few mins. Now looking for VB script that asks the person what ID they want from the dbase and we're done.
it uses docx templates that have merge fields with java objects (the objects have the information you load from mysql or any other source). The xdoc report is an project for java language, the home page of the project is https://code.google.com/p/xdocreport/.
*Disclosure: I create the templ4docx project *
Hello
You can use templ4docx java library, which is on maven central repository, so you can just add it to your maven dependencies:
<dependency>
<groupId>pl.jsolve</groupId>
<artifactId>templ4docx</artifactId>
<version>2.0.0</version>
</dependency>
Example usage:
Docx docx = new Docx("E:\\template.docx");
Variables variables = new Variables();
variables.addTextVariable(new TextVariable("${firstName}", "John"));
variables.addTextVariable(new TextVariable("${lastName}", "Sky"));
docx.fillTemplate(variables);
docx.save("E:\\filledTemplate.docx");
More details you can find here: http://jsolve.github.io/java/templ4docx/