Databases
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    <p>Most likely you are about to spend a fair amount of time restructuring your database.</p> <p>The first step is that you are going to create a table to house your "Tenant" list. Then you need to add this TenantId to just about every table in your system to make sure no one steps on each other. You can skip any tables that are global in nature. One example might be a list of Status Codes.</p> <p>However, everything from users to the data they have etc will have to have this ID. Also, modify all of your indexes to take tenantid into account.</p> <p>Once you have that, you'll need to modify all of your queries to take the tenantid into account.</p> <p>One column of the tenants table should be the portal url. Like customername.oursite.com or whatever. This way you could point multiple urls to the exact same code. When the site needs to use the current tenantid just look it up based on the URL the passed in.</p> <p>If I was doing this, I'd plan to spend about 1 to 2 hours per table in the database to make it "multi-tenant". Obviously some tables (and their queries) will go faster; others will take longer. </p> <p>Incidentally, this doesn't cover things like customizing the UI (look / feel) per tenant or anything of that nature. If you need to do this then you'll have to either create a directory on the server for each tenant to hold their style sheets or load it directly from the DB (which has it's own issues with regards to caching).</p> <p>Typically, you design for this at the beginning of the project. Refitting an already (or almost) complete project is a PITA.</p> <p>Finally, test, test, test and do more testing. You will have to make sure that every single query pulls only the data it absolutely needs to.</p>
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    1. POWhat to keep in mind when developing a multi-tenant asp.net MVC application?
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    1. COThis article discusses several database designs: http://msdn.microsoft.com/en-us/library/aa479086.aspx
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    2. CO@rboarman: good link. I forgot about that one.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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