SDGs and Deptartments should be AND connected

[phish108]

if two SDG or departments are used in the same search, the MUST be cooccurring and not individually.

Question: What would the most common connector? AND or OR.

When using cooccurrence with "AND", the in operator will be used as a singleton operator and is then connected with an and operator.

idea:

...

sdg(filter: {
    and: [ 
        { id:  in: [ "3" ] },
        { id:  in: [ "7" ] }
    ]
]) {
    id 
}

...

We should use and explicitly, despite the fact that and is default. the reason is, that it is more readable about what is happening and it is better to express in JSON.

[phish108]

Decision today was:

• By default all items should be linked by AND, so one can drill into the data and narrow down the results. This would allow questions such as "what are joint publications/projects/modules of department A and G on SDG 3?"
• At a later stage a user may ask questions such "what are the publications of department A and G on SDG 3?"

The first bullet needs to get fixed now, the second bullet should be a refinement in a second stage.

The code of all queries must be changed to:

sdg(filter: {
    and: [ 
        { id:  eq: "3" },
        { id:  eq: "7" }
    ]
]) {
    id 
}

Same as for departments.

This changes the initial meaning of the search box. If two SDGs are entered, then this means that all InfoObjects that were marked for both SDGs are included in the search result.